# A151256 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 23 6 61 7 153 8 418 9 1100 10 3064 11 8307 12 23447 13 64864 14 184825 15 518709 16 1488535 17 4222233 18 12183197 19 34838780 20 100966510 21 290552075 22 845040527 23 2444044917 24 7129099964 25 20703110094 26 60537979132 27 176393527768 28 516869732557 29 1510240001769 30 4433253350132 31 12983932323027 32 38173103248661