# A025993 (b-file synthesized from sequence entry) 0 1 1 23 2 344 3 4258 4 47487 5 496725 6 4981918 7 48547136 8 463544213 9 4361492707 10 40596873252 11 374857310334 12 3440520848779 13 31434357529169 14 286207079508746 15 2598999610410652 16 23553202070626785 17 213115529239825311