# A016263 (b-file synthesized from sequence entry) 0 1 1 22 2 355 3 5080 4 68341 5 886522 6 11236135 7 140214460 8 1731001081 9 21207861022 10 258416964715 11 3136307268640 12 37953420452221 13 458300644483522 14 5525344125314095 15 66535757027375620 16 800513732040965761