# A005833 (b-file synthesized from sequence entry) 0 0 1 1 2 1 3 2 4 3 5 6 6 10 7 19 8 35 9 65 10 121 11 226 12 421 13 786 14 1467 15 2738 16 5111 17 9541 18 17810 19 33247 20 62064 21 115858 22 216279 23 403741 24 753687 25 1406953 26 2626444 27 4902941 28 9152616 29 17085741 30 31894984