# A001409 (b-file synthesized from sequence entry) 0 1 1 0 2 3 3 22 4 207 5 2412 6 31754 7 452640 8 6840774 9 108088232 10 1768560270 11 29764630632 12 512705615350 13 9005206632672 14 160810554015408 15 2912940755956084 16 53424552150523386