# A018165 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 5 4 10 5 18 6 32 7 57 8 101 9 181 10 324 11 577 12 1029 13 1835 14 3271 15 5832 16 10396 17 18532 18 33035 19 58889 20 104976 21 187130 22 333579 23 594639 24 1060005 25 1889568 26 3368348 27 6004426 28 10703505 29 19080094 30 34012224 31 60630274