# A356406 (b-file synthesized from sequence entry) 1 1 2 4 3 16 4 79 5 443 6 2968 7 22216 8 189698 9 1792402 10 18745036 11 213452996 12 2653142952 13 35448861576 14 509724975264 15 7824794618208 16 128006170541328 17 2217950478978576 18 40686737647774368 19 785852762719168992 20 15974195890305405696 21 340376906088298319616