# A302610 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 3 4 4 5 20 6 158 7 819 8 3624 9 33984 10 427482 11 3819915 12 29665260 13 404822340 14 6948032310 15 88407058635 16 991515848400 17 17715286764000 18 383952670412850 19 6349179054589875 20 93532380775766100 21 2063197602667372500 22 53913667654307868750 23 1098018631195048591875