# A186240 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 7 4 21 5 66 6 228 7 799 8 2843 9 10357 10 38278 11 143012 12 539980 13 2056848 14 7892496 15 30483351 16 118416903 17 462348219 18 1813410078 19 7141608015 20 28229040165 21 111956307486 22 445374729396 23 1776704142348 24 7105896093588 25 28487216564476 26 114454156300136 27 460781265916312