# A024446 (b-file synthesized from sequence entry) 0 1 1 31 2 638 3 10982 4 171171 5 2506917 6 35201776 7 479688604 8 6392929061 9 83765551883 10 1083070611714 11 13855878102066 12 175736023769671 13 2213065674408529 14 27704146634051252 15 345076242383014568 16 4279844990866901001 17 52886642197647118455 18 651455131567317021190