# A056496 (b-file synthesized from sequence entry) 1 5 2 10 3 20 4 60 5 120 6 340 7 620 8 1800 9 3100 10 9240 11 15620 12 46440 13 78120 14 233740 15 390480 16 1170000 17 1953120 18 5855900 19 9765620 20 29287440 21 48827480 22 146468740 23 244140620 24 732373200 25 1220703000 26 3662031240