# A261779 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 2 5 5 6 20 7 103 8 630 9 4480 10 36288 11 329891 12 3326400 13 36846277 14 444787200 15 5811886080 16 81729648000 17 1230752346353 18 19760412672000 19 336967037143579 20 6082255020441600 21 115852476579840000 22 2322315553259520000 23 48869596859895986087 24 1077167364120207360000 25 24817936069329577574400 26 596585001666576384000000