# A370474 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 54 4 372 5 2778 6 21873 7 178786 8 1502649 9 12904524 10 112741664 11 998871030 12 8953443276 13 81047485148 14 739846170864 15 6803054508702 16 62954736555836 17 585850907166084 18 5479077065774682 19 51470699845616004 20 485456696541512442 21 4595280949098247422