# A106793 (b-file synthesized from sequence entry) 0 1 1 26 2 650 3 15600 4 358800 5 7893600 6 165765600 7 3315312000 8 62990928000 9 1133836704000 10 19275223968000 11 308403583488000 12 4626053752320000 13 64764752532480000 14 841941782922240000 15 10103301395066880000