# A049101 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 15 11 18 12 24 13 45 14 48 15 135 16 144 17 288 18 378 19 476 20 756 21 864 22 1575 23 39366 24 69984 25 139968