This stitch pattern is used in the Castellane Pullover.

Worked over a multiple of 10 minus 1 stitches

Row 1 (RS): Knit.
Row 2: Knit.
Row 3: Knit.
Row 4: Knit.
Row 5: *K2tog, yo; rep from *, k1.
Row 6: Knit.
Row 7: Knit.
Row 8: Knit.
Row 9: Knit.
Row 10: Purl.
Row 11: *K2, ssk, yo, k1, yo, k2tog, k3; rep from *, end last rep k2 instead of k3.
Row 12: Purl.
Row 13: *K1, ssk, yo, k3, yo, k2tog, k2; rep from *, end last rep k1 instead of k2.
Row 14: Purl.
Row 15: *K3, yo, sl2-k1-p2sso, yo, k4; rep from *, end last rep k3 instead of k4.
Row 16: Purl.

Here is a photo of the stitch pattern.