# A218304 (b-file synthesized from sequence entry) 0 1 1 3 2 30 3 468 4 10248 5 291888 6 10282464 7 432631104 8 21195292800 9 1186054914816 10 74676568432128 11 5226914768016384 12 402722750814750720 13 33876716756962652160 14 3089713688099323502592 15 303723970839738425622528 16 32015024916407062538256384