A051059 Record subsequence of b(3k), b()=A048141().

1, 1, 2, 2, 2, 3, 4, 4, 5, 6, 6, 8, 10, 10, 12, 14, 15, 18, 20, 22, 26, 30, 33, 37, 42, 47, 54, 62, 68, 81, 93, 104, 122, 142, 163, 192, 225, 264, 311, 371, 437, 523, 623, 739, 885, 1063, 1266, 1518, 1817, 2175