# A104880 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 5 5 8 6 14 7 26 8 53 9 117 10 280 11 721 12 1989 13 5844 14 18188 15 59652 16 205305 17 739041 18 2775190 19 10846975 20 44039765 21 185391480 22 807776210 23 3637193486 24 16900721837 25 80939650565 26 399061251260 27 2023408865997 28 10540656630133 29 56362743769012