# A148550 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 5 4 21 5 44 6 189 7 433 8 1947 9 4754 10 21843 11 55593 12 258846 13 678794 14 3197214 15 8581819 16 40729683 17 111318770 18 531516095 19 1474157217 20 7074437422 21 19861550204 22 95678831934 23 271365160703 24 1311627336770 25 3752647088859 26 18188168212984 27 52430062200878 28 254708413161552 29 739061852992557 30 3597755538480279