# A148464 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 19 5 61 6 209 7 751 8 2780 9 10530 10 40645 11 159331 12 634004 13 2555818 14 10406137 15 42736003 16 176987498 17 738572161 18 3101989207 19 13102951031 20 55643811842 21 237474178387 22 1018032832418 23 4381947392234 24 18932122549024 25 82083627726775 26 357053109955461 27 1557819782212992 28 6815800335178806