# A337314 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 4536 5 45360 6 294840 7 1587600 8 7715736 9 35244720 10 154700280 11 661122000 12 2773768536 13 11487556080 14 47136955320 15 192126589200 16 779279814936 17 3149513947440 18 12695388483960 19 51073849285200 20 205172877726936 21 823325141746800 22 3301203837670200 23 13228529919066000