# A377946 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 10 4 40 5 136 6 512 7 2080 8 8320 9 32896 10 131072 11 524800 12 2099200 13 8390656 14 33554432 15 134225920 16 536903680 17 2147516416 18 8589934592 19 34359869440 20 137439477760 21 549756338176 22 2199023255552 23 8796095119360 24 35184380477440 25 140737496743936 26 562949953421312