# A012535 (b-file synthesized from sequence entry) 0 2 1 8 2 200 3 9088 4 815008 5 107966080 6 21110274432 7 5547859611648 8 1915915213103616 9 835475489428146176 10 450640330168225851392 11 294111441801356743442432 12 228643425697131126294224896