# A149488 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 14 4 51 5 201 6 823 7 3436 8 14575 9 62776 10 273766 11 1204282 12 5337100 13 23810913 14 106823537 15 481534000 16 2179638646 17 9902272921 18 45133705547 19 206310531515 20 945515644303 21 4343445670182 22 19995082395510 23 92225885065701 24 426139227741927 25 1972226545914777 26 9141415516033028 27 42429942858806258