# A025991 (b-file synthesized from sequence entry) 0 1 1 25 2 417 3 5909 4 77369 5 972381 6 11958289 7 145367893 8 1756276137 9 21149737037 10 254259660161 11 3053974195077 12 36665246878105 13 440090336260093 14 5281738449973233 15 63384838751399861 16 760642183440232073