# A134857 (b-file synthesized from sequence entry) 1 241920 2 1048320 3 10200960 4 25724160 5 37255680 6 93139200 7 123963840 8 245044800 9 588107520 10 819786240 11 1407893760 12 1871251200 13 3758169600 14 5886558720 15 8553283200 16 10783342080 17 13470367680 18 19769460480 19 30791819520 20 40446806400