# A102591 (b-file synthesized from sequence entry) 0 1 1 6 2 44 3 328 4 2448 5 18272 6 136384 7 1017984 8 7598336 9 56714752 10 423324672 11 3159738368 12 23584608256 13 176037912576 14 1313964867584 15 9807567290368 16 73204678852608 17 546407161659392 18 4078438577864704 19 30441879976280064