# A074414 (b-file synthesized from sequence entry) 1 1 2 0 3 0 4 6 5 24 6 104 7 432 8 1950 9 8736 10 39298 11 177784 12 813748 13 3755048 14 17438400 15 81380192 16 381468750 17 1795133272 18 8477100632 19 40154790296 20 190735234220 21 908261625600 22 4334883167500 23 20732048658288 24 99341074218100 25 476837158203000 26 2292486335637500