# A094297 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 18 5 46 6 120 7 316 8 840 9 2248 10 6048 11 16336 12 44256 13 120160 14 326784 15 889792 16 2424960 17 6613120 18 18043392 19 49247488 20 134450688 21 367134208 22 1002645504 23 2738510848 24 7480215552 25 20433258496 26 55818559488 27 152486858752