# A001625 (b-file synthesized from sequence entry) 2 2 3 4 4 60 5 1276 6 41888 7 1916064 8 116522048 9 9069595840 10 878460379392 11 103547791177216 12 14588580791234048 13 2420219602973093376 14 466877775127725240320 15 103607067936116866084864 16 26204424894484840874483712