# A023617 (b-file synthesized from sequence entry) 1 1 2 5 3 13 4 29 5 59 6 113 7 207 8 363 9 623 10 1047 11 1745 12 2881 13 4725 14 7721 15 12571 16 20425 17 33143 18 53733 19 87055 20 140977 21 228237 22 369429 23 597891 24 967561 25 1565707 26 2533543 27 4099545 28 6633393