# A049967 (b-file synthesized from sequence entry) 1 1 2 3 3 1 4 8 5 21 6 37 7 79 8 187 9 524 10 864 11 1733 12 3495 13 7140 14 14957 15 32545 16 76552 17 214699 18 352849 19 705703 20 1411435 21 2823020 22 5646717 23 11296065 24 22603592 25 45268779 26 90813855 27 182686296 28 369607874 29 756172623 30 1580555509 31 3439905037