Shown with a cast-on count of 2 stitches.  

• Round 1: [Ctr dbl inc] twice (6 sts).
• Rounds 3-4, 6-7, 9-10, 12-13, 15-16, 18-19, 21-22, 24-25, 27-28, 30-31, 33-34, 36-37, 39-40, 42-43, 45-46, 48-49, 51, 54-55, 57-58, 60-61, 63-64, 66-67, 69-70, 72-73, 75-76, and 78-79: Knit.
• Round 5: [K1, ctr dbl inc, k1] twice (10 sts).
• Round 8: [K2, ctr dbl inc, k2] twice (14 sts).
• Round 11: [K3, ctr dbl inc, k3] twice (18 sts).
• Round 14: [K4, ctr dbl inc, k4] twice (22 sts).
• Round 17: [K5, ctr dbl inc, k5] twice (26 sts).
• Round 20: [K6, ctr dbl inc, k6] twice (30 sts).
• Round 23: [K7, ctr dbl inc, k7] twice (34 sts).
• Round 26: [K8, ctr dbl inc, k8] twice (38 sts).
• Round 29: [K9, ctr dbl inc, k9] twice (42 sts).
• Round 32: [K10, ctr dbl inc, k10] twice (46 sts).
• Round 35: [K11, ctr dbl inc, k11] twice (50 sts).
• Round 38: [K12, ctr dbl inc, k12] twice (54 sts).
• Round 41: [K13, ctr dbl inc, k13] twice (58 sts).
• Round 44: [K14, ctr dbl inc, k14] twice (62 sts).
• Round 47: [K15, ctr dbl inc, k15] twice (66 sts).
• Round 50: [K16, ctr dbl inc, k16] twice (70 sts).
• Round 53: [K17, ctr dbl inc, k17] twice (74 sts).
• Round 56: [K18, ctr dbl inc, k18] twice (78 sts).
• Round 59: [K19, ctr dbl inc, k19] twice (82 sts).
• Round 62: [K20, ctr dbl inc, k20] twice (86 sts).
• Round 65: [K21, ctr dbl inc, k21] twice (90 sts).
• Round 68: [K22, ctr dbl inc, k22] twice (94 sts).
• Round 71: [K23, ctr dbl inc, k23] twice (98 sts).
• Round 74: [K24, ctr dbl inc, k24] twice (102 sts).
• Round 77: [K25, ctr dbl inc, k25] twice (106 sts).