# A049975 (b-file synthesized from sequence entry) 1 1 2 3 3 3 4 10 5 27 6 47 7 101 8 239 9 670 10 1104 11 2215 12 4467 13 9126 14 19117 15 41597 16 97844 17 274415 18 450989 19 901985 20 1804007 21 3608206 22 7217277 23 14437917 24 28890484 25 57859695 26 116072535 27 233498088 28 472409446 29 966492099 30 2020166249