Abbrevations
k = Knit p = purl
3x3 Seed Cable: sl 3 sts onto cable needle and hold at front, k3, the k1, p1, k1 from cable needle
3x3 Reverse Seed Cable: sl 3 sts onto cable needle and hold at front, k1, p1, k1, then k3 from cable needle
Multiple of 16 stitches plus 10
Row 1 (WS): k2, p3, k1, p1, k3, *p3, k1, p1, k3, p3, k1, p1, k3; rep from * across.
Row 2: *p2, k1, p1, k4, p2, 3x3 Seed Cable; rep from * across to last 10 sts, end p2, k1, p1, k4, p2.
Row 3: k2, p3, k1, p1, k3, *k1, p1, k1, p3, k2, p3, k1, p1, k3; rep from * across.
Row 4: *p2, k1, p1, k4, p2, k4, p1, k1; rep from * across to last 10 sts, end p2, k1, p1, k4, p2.
Row 5: k2, p3, k1, p1, k3, *k1, p1, k1, p3, k2, p3, k1, p1, k3; rep from * across.
Row 6: *p2, 3x3 Seed Cable, p2, k4, p1, k1; rep from * across to last 10 sts, end p2, 3x3 Seed Cable, p2.
Row 7: k3, p1, k1, p3, k2, *k1, p1, k1, p3, k3, p1, k1, p3, k2; rep from * across.
Row 8: *p2, k4, p1, k1, p2, k4, p1, k1, ; rep from * across to last 10 sts, end p2, k4, p1, k1, p2.
Row 9: k3, p1, k1, p3, k2, *k1, p1, k1, p3, k3, p1, k1, p3, k2; rep from * across.
Row 10: *p2, k3, p1, k1, p3, 3x3 Reverse Seed Cable; rep from * across to last 10 sts, end p2, k4, p1, k1, p2.
Row 11: k3, p1, k1, p3, k2, *p3, k1, p1, k4, p1, k1, p3, k2; rep from * across.
Row 12: *p2, k4, p1, k1, p2, k1, p1, k4, ; rep from * across to last 10 sts, end p2, k4, p1, k1, p2.
Row 13: k3, p1, k1, p3, k2, *p3, k1, p1, k4, p1, k1, p3, k2; rep from * across.
Row 14: *p2, 3x3 Reverse Seed Cable, p3, k1, p1, k3; rep from * across to last 10 sts, end p2, 3x3 Reverse Seed Cable, p2.
Row 15: k2, p3, k1, p1, k3, *p3, k1, p1, k3, p3, k1, p1, k3; rep from * across.
Row 16: *p2, k1, p1, k4, p2, k1, p1, k4; rep from * across to last 10 sts, end p2, k1, p1, k4, p2.
Repeat rows 116 until desired length.
I hope you have found this useful and informative.