# A019185 (b-file synthesized from sequence entry) 3 0 4 0 5 6 6 0 7 0 8 48 9 36 10 72 11 456 12 588 13 1032 14 4596 15 9324 16 19908 17 64164 18 155520 19 366456 20 1029060 21 2664612 22 6732000 23 18220368 24 48373068 25 126575628 26 339532836 27 908895096 28 2418938244 29 6497355624 30 17481603528 31 46965683160