A051056 Record subsequence of b(3k), b()=A048142().
0, 0, 0, 0, 1, 1, 2, 3, 5, 7, 11, 14, 20, 27, 37, 48, 65, 83, 109, 139, 179, 226, 288, 361, 456, 569, 712, 885, 1105, 1371, 1708, 2125
Offset: 0
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