OFFSET
1,1
LINKS
Artur Jasinski & Michel Marcus, Table of n, a(n) for n = 1..60
FORMULA
MATHEMATICA
With[{nn=10000}, Select[Flatten[Position[Denominator[Thread[{Accumulate[1/ Range[ nn]^2], Accumulate[ 1/Range[nn]^3]}]], _?(IntegerQ[Sqrt[First[#]]] && IntegerQ[Surd[Last[#], 3]]&), {1}, Heads->False]], PrimeQ]] (* Harvey P. Dale, Mar 05 2014 *)
PROG
(PARI) lista(nn) = {forprime(p = 2, nn, if (issquare(denominator(sum(k=1, p-1, 1/k^2))) && ispower(denominator(sum(k=1, p-1, 1/k^3)), 3), print1(p, ", ")); ); } \\ Michel Marcus, Nov 05 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Jan 04 2007
EXTENSIONS
More terms from Max Alekseyev, Feb 08 2007
Missing terms in the [9461, 9587] range inserted by Michel Marcus, Nov 05 2013
STATUS
approved