# A107874 (b-file synthesized from sequence entry) 0 1 1 4 2 15 3 84 4 715 5 8568 6 134596 7 2629575 8 61523748 9 1677106640 10 52179482355 11 1823810410032 12 70724320184700 13 3012192716517082 14 139737927523546800 15 7012067478708989884 16 378371310857796292200 17 21843987843214746108900