# A049187 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 3 6 15 7 57 8 167 9 423 10 1099 11 3391 12 11855 13 41149 14 134185 15 418859 16 1313861 17 4285349 18 14456605 19 49097477 20 164889821 21 548126215 22 1824046555 23 6131204373 24 20817947419 25 70988707243 26 241907381783 27 823235370195 28 2804366824235