# A147890 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 24 5 96 6 444 7 3172 8 16976 9 112790 10 839320 11 7525858 12 86947336 13 816752748 14 8170308628 15 90956874778 16 1199823762964