# A057969 (b-file synthesized from sequence entry) 0 1 1 5 2 24 3 115 4 551 5 2542 6 11193 7 46547 8 182164 9 670476 10 2325506 11 7624434 12 23716419 13 70253721 14 198905506 15 540079754 16 1410786483 17 3555443969 18 8667153126 19 20484365167 20 47037898503 21 105143200252 22 229178029000