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A352205
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a(0) = 0; for n>0, a(n) is the index of the last term in A109812 that is <= 2^n - 1.
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2
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0, 1, 4, 16, 28, 76, 162, 418, 650, 1892, 3555, 7252, 20059, 39786, 84653, 174566, 343911, 690189, 1688099, 3366971, 7131089, 14446268, 31036955, 62485240, 145444358, 290692248, 624275567
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OFFSET
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0,3
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COMMENTS
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It appears that the last term in A109812 of binary length n is always 2^n - 1 itself. The term after that is (by definition) A352206(n).
If we subtract 1 from a(n), we appear to get a subsequence of A352204, the indices of record high points in A109812.
There are also occasional near-coincidences with A305370.
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LINKS
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EXAMPLE
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The last term in A109812 of binary length at most 3 is A109812(16) = 7, so a(3) = 16.
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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