# A037148 (b-file synthesized from sequence entry) 0 1 1 0 2 196560 3 22266840960 4 32657336384400 5 488671648133760 6 53439465983183280 7 1517285377810500480 8 33146268593842731600 9 495735471753920012160 10 5599704694679105905440 11 50142366540860643504000 12 370980488114849951891280 13 2338140291564951182050560