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URL: https://oeis.org/A357313

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A357313
a(n) is the unique number m such that A001065(m) = A057709(n).
4
4, 9, 8, 15, 14, 21, 121, 289, 529, 46, 28, 841, 62, 24, 1369, 217, 2209, 106, 68, 3481, 54, 4489, 134, 5041, 66, 6241, 158, 6889, 166, 116, 9409, 10201, 218, 226, 148, 130, 114, 16129, 17161, 18769, 278, 90, 24649, 314, 26569, 27889, 108, 29929, 225, 32041, 244
OFFSET
1,1
LINKS
FORMULA
A001065(a(n)) = A057709(n).
EXAMPLE
a(1) = 4 since 4 is the unique solution m to A001065(m) = A057709(1) = 3.
MATHEMATICA
seq[max_] := Module[{s = t = Table[0, {n, 1, max}], i, j}, Do[If[(i = DivisorSigma[1, n] - n) <= max, s[[i]]++; t[[i]] = n], {n, 2, (max - 1)^2}]; j = Position[s, 1] // Flatten; t[[j]]]; seq[250]
CROSSREFS
Sequence in context: A140808 A163642 A220533 * A085084 A248390 A075570
KEYWORD
nonn
AUTHOR
Amiram Eldar, Sep 23 2022
STATUS
approved