a(n) = A014486(A122241(n)).
42, 240, 916, 3748, 14960, 62104, 248176, 969304, 3876576, 15962544, 63772488
2 seqfan posts
Sun May 29 19:25:46 CEST 2011 [seqfan] Re: Long chains
Fri May 27 08:15:20 CEST 2011 [seqfan] Long chains
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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