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 A236285 a(n) = tau(n)^sigma(n), where tau(n) = A000005(n) = the number of divisors of n and sigma(n) = A000203(n) = the sum of divisors of n. 5
 1, 8, 16, 2187, 64, 16777216, 256, 1073741824, 1594323, 68719476736, 4096, 6140942214464815497216, 16384, 281474976710656, 281474976710656, 4656612873077392578125, 262144, 2227915756473955677973140996096, 1048576, 481229803398374426442198455156736 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Jaroslav Krizek, Table of n, a(n) for n = 1..100 FORMULA a(n) = A000005(n)^A000203(n). EXAMPLE a(4) = tau(4)^sigma(4) = 3^7 = 2187. MATHEMATICA Table[DivisorSigma[0, n]^DivisorSigma[1, n], {n, 1000}] PROG (PARI) s=[]; for(n=1, 20, s=concat(s, sigma(n, 0)^sigma(n))); s \\ Colin Barker, Jan 22 2014 CROSSREFS Cf. A000005 (tau(n)), A000203 (sigma(n)), A062758 (n^tau(n)), A217872 (sigma(n)^n), A236284 (tau(n)^n), A236286. Sequence in context: A061747 A109585 A284438 * A247850 A024280 A115434 Adjacent sequences:  A236282 A236283 A236284 * A236286 A236287 A236288 KEYWORD nonn AUTHOR Jaroslav Krizek, Jan 21 2014 STATUS approved

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Last modified February 29 03:43 EST 2020. Contains 332353 sequences. (Running on oeis4.)