# A126510 (b-file synthesized from sequence entry) 0 1 1 15 2 115 3 915 4 7355 5 59369 6 479887 7 3880945 8 31391483 9 253929457 10 2054110259 11 16616430593 12 134416594859 13 1087347726489 14 8795978441155 15 71154097145873 16 575593242083915 17 4656198285106057 18 37665804590772499 19 304693389569808737