# A179997 (b-file synthesized from sequence entry) 1 2 2 4 3 6 4 9 5 15 6 25 7 48 8 91 9 169 10 336 11 669 12 1335 13 2665 14 5317 15 10573 16 21037 17 42072 18 84141 19 168279 20 336553 21 673099 22 1345639 23 2691276 24 5382549 25 10765095 26 21528959 27 43057916 28 86115821 29 172231631 30 344463251 31 688926491 32 1377847349 33 2755694696 34 5511375473 35 11022750944