# A148790 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 25 5 77 6 257 7 853 8 2946 9 10178 10 36005 11 127635 12 459307 13 1657395 14 6042087 15 22089132 16 81346477 17 300383933 18 1115251580 19 4151032922 20 15515158110 21 58122268630 22 218459019113 23 822782085889 24 3107215915981 25 11755843600909 26 44576827929909 27 169308082883825 28 644271153070229 29 2455271638906533