# A048139 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 5 5 8 6 16 7 30 8 54 9 94 10 168 11 287 12 493 13 831 14 1391 15 2293 16 3769 17 6114 18 9867 19 15782 20 25098 21 39598 22 62165 23 96935 24 150398 25 232021 26 356261 27 544220 28 827758 29 1253222 30 1889655 31 2837455 32 4244505 33 6324993 34 9392009 35 13897056 36 20494991 37 30126628