# A129331 (b-file synthesized from sequence entry) 0 0 1 1 2 8 3 60 4 464 5 3780 6 32568 7 296492 8 2845088 9 28695060 10 303334920 11 3351877628 12 38622668400 13 463036981732 14 5764038605528 15 74365952622540 16 992720923710272 17 13690497077256628 18 194777994524434344 19 2855149354656290716