# A117415 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 12 4 272 5 9920 6 530688 7 39144448 8 3807514624 9 472197021696 10 72722212782080 11 13616619646091264 12 3046271659520557056 13 802494810618175946752 14 245880605613803859607552 15 86696940704285991905525760 16 34855851028500677184683245568