A366715 Sum of the divisors of 12^n+1.
3, 14, 180, 2240, 21060, 267988, 3706920, 38773952, 459970056, 6692483840, 79425033660, 800162860756, 9101898907920, 117326869641600, 1596198064568400, 20655000929239040, 184885459808838660, 2390210102271311936, 33504016991491136160, 344201347103878781440
Offset: 0
Keywords
Examples
a(4)=21060 because 12^4+1 has divisors {1, 89, 233, 20737}.
Links
- Max Alekseyev, Table of n, a(n) for n = 0..306
Crossrefs
Programs
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Maple
a:=n->numtheory[sigma](12^n+1): seq(a(n), n=0..100);