# A245774 (b-file synthesized from sequence entry) 1 1 2 3 3 6 4 12 5 28 6 84 7 120 8 234 9 270 10 496 11 672 12 1080 13 1488 14 1638 15 6048 16 6552 17 8128 18 24384 19 30240 20 32760 21 35640 22 199584 23 435708 24 523776 25 2142720 26 2178540 27 4713984 28 12999168 29 18506880 30 23569920 31 33550336 32 36197280 33 45532800