# A307709 (b-file synthesized from sequence entry) 0 0 1 1 2 1 3 2 4 8 5 39 6 240 7 1726 8 14189 9 130790 10 1334873 11 14935261 12 181757070 13 2390363103 14 33787482806 15 510879775905 16 8229231626244 17 140698662551489 18 2545031258526411 19 48561748888174242 20 974858528384809324 21 20539450727358618457 22 453191882910044604304 23 10450775091071489910630