# A129325 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 1 4 8 5 60 6 440 7 3290 8 25424 9 204120 10 1705680 11 14836470 12 134240040 13 1262060228 14 12313382536 15 124509169330 16 1303109358880 17 14098102762160 18 157473907149600 19 1813923418494126 20 21523529286435000 21 262809607270736540