# A124818 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 4 5 12 6 19 7 56 8 97 9 284 10 519 11 1516 12 2871 13 8380 14 16281 15 47517 16 94117 17 274733 18 552458 19 1613119 20 3283615 21 9590965 22 19720434 23 57620008 24 119480043 25 349217316 26 729363169 27 2132461957 28 4481537753 29 13106711534