# A075650 (b-file synthesized from sequence entry) 1 1 2 6 3 18 4 52 5 90 6 174 7 301 8 472 9 684 10 1050 11 1507 12 1788 13 2418 14 3542 15 4650 16 5456 17 6086 18 8910 19 10450 20 11780 21 13251 22 16258 23 19550 24 22680 25 25450 26 31694 27 35046 28 30940 29 46081 30 52050 31 56606 32 64416 33 68607 34 78710 35 84630 36 94644 37 109298 38 123538 39 131274 40 144040