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A176030 a(n)= n^(sigma_2(n)) 0
1, 32, 59049, 4398046511104, 1490116119384765625, 808281277464764060643139600456536293376, 1798465042647412146620280340569649349251249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

sigma_2 = A001157 is the sum of squares of divisors of n.

LINKS

Table of n, a(n) for n=1..7.

FORMULA

a(n)= n^A001157(n).

EXAMPLE

a(1) = 1^1 = 1.

a(2) = 2^(1+4) = 32.

a(3) = 3^(1+9) = 59049.

MATHEMATICA

Table[n^DivisorSigma[2, n], {n, 20}]

CROSSREFS

Cf. A001157, A100879.

Sequence in context: A054374 A221138 A017009 * A034245 A230566 A017093

Adjacent sequences:  A176027 A176028 A176029 * A176031 A176032 A176033

KEYWORD

nonn,easy

AUTHOR

Michel Lagneau, Apr 06 2010

STATUS

approved

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Last modified August 27 21:58 EDT 2015. Contains 261098 sequences.