# A369693 (b-file synthesized from sequence entry) 0 1 1 4 2 10 3 20 4 36 5 72 6 220 7 936 8 4045 9 15836 10 56174 11 187148 12 616651 13 2114448 14 7717752 15 29498000 16 114243269 17 437915876 18 1650264874 19 6149423732 20 22909545269 21 86129798600 22 327872238092 23 1260466647944 24 4867739842821 25 18801022899756 26 72501445905366