# A116786 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 21 5 72 6 228 7 670 8 1864 9 5000 10 13099 11 33789 12 86239 13 218432 14 550107 15 1379348 16 3446817 17 8590103 18 21362792 19 53037845 20 131501095 21 325690131 22 805941635 23 1992965105 24 4925514322 25 12167639830 26 30047049122 27 74176872249 28 183075826494