# A049135 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 6 5 22 6 88 7 368 8 1585 9 6984 10 31348 11 142868 12 659434 13 3076432 14 14483556 15 68723800 16 328322903 17 1577959294 18 7624155960 19 37011662868 20 180436535308 21 883016392536 22 4336268255420 23 21361517691248 24 105535705919116