Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): *P1, yo, k7, ssk, k8, repeat from * to last st, p1.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: *K9, p9, repeat from * to last st, k1.
• Row 3: *P1, k1, yo, k6, ssk, k8, repeat from * to last st, p1.
• Row 5: *P1, k2, yo, k5, ssk, k8, repeat from * to last st, p1.
• Row 7: *P1, k3, yo, k4, ssk, k8, repeat from * to last st, p1.
• Row 9: *P1, k4, yo, k3, ssk, k8, repeat from * to last st, p1.
• Row 11: *P1, k5, yo, k2, ssk, k8, repeat from * to last st, p1.
• Row 13: *P1, k6, yo, k1, ssk, k8, repeat from * to last st, p1.
• Row 15: *P1, k7, yo, ssk, k8, repeat from * to last st, p1.
• Row 17: *P1, k8, k2tog, k7, yo, repeat from * to last st, p1.
• Rows 18, 20, 22, 24, 26, 28, 30, and 32: K1, *p9, k9, repeat from *.
• Row 19: *P1, k8, k2tog, k6, yo, k1, repeat from * to last st, p1.
• Row 21: *P1, k8, k2tog, k5, yo, k2, repeat from * to last st, p1.
• Row 23: *P1, k8, k2tog, k4, yo, k3, repeat from * to last st, p1.
• Row 25: *P1, k8, k2tog, k3, yo, k4, repeat from * to last st, p1.
• Row 27: *P1, k8, k2tog, k2, yo, k5, repeat from * to last st, p1.
• Row 29: *P1, k8, k2tog, k1, yo, k6, repeat from * to last st, p1.
• Row 31: *P1, k8, k2tog, yo, k7, repeat from * to last st, p1.
• Repeat rows 1-32.