# A079916 (b-file synthesized from sequence entry) 0 1 1 12 2 972 3 19640 4 260019 5 2365772 6 16266830 7 89700624 8 413977192 9 1650607040 10 5826331440 11 18558391936 12 54055214144 13 145576033920 14 365883104080 15 865023114560 16 1936764883296 17 4130528893504 18 8433028861040