# A075886 (b-file synthesized from sequence entry) 1 1 2 6 3 30 4 150 5 726 6 3510 7 16854 8 80886 9 387606 10 1857078 11 8894550 12 42598518 13 204000918 14 976929462 15 4678286550 16 22403128566 17 107282481942 18 513746046774 19 2460185076054 20 11781130000758 21 56416485185430 22 270162504104886