# A125398 (b-file synthesized from sequence entry) 0 1 1 10 2 88 3 724 4 6412 5 57120 6 510214 7 4559754 8 40756276 9 364302976 10 3256378378 11 29107705802 12 260184449794 13 2325705707374 14 20788741351382 15 185823928401414 16 1661020831456212 17 14847335474122436 18 132715596660687976