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A176030
a(n) = n^(sigma_2(n)).
0
1, 32, 59049, 4398046511104, 1490116119384765625, 808281277464764060643139600456536293376, 1798465042647412146620280340569649349251249
OFFSET
1,2
COMMENTS
sigma_2 = A001157 is the sum of squares of divisors of n.
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
Sequence in context: A054374 A221138 A017009 * A034245 A230566 A017093
KEYWORD
nonn,easy
AUTHOR
Michel Lagneau, Apr 06 2010
STATUS
approved