# A002357 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 31 5 100 6 331 7 431 8 2486 9 2917 10 5403 11 24529 12 250693 13 4286310 14 4537003 15 67804352 16 72341355 17 140145707 18 427797039119 19 427937184826 20 855734223945 21 1283671408771 22 2139405632716 23 3423077041487 24 5562482674203 25 14548042389893