login
A114083
Numbers k such that sigma(k) plus the k-th prime gives a fourth power.
2
1432, 220425, 499997, 3437037, 3518771, 5693370, 8913770
OFFSET
1,1
EXAMPLE
sigma(499997) + p(499997) = 7890481 = 53^4.
PROG
(PARI) isok(n) = ispower(sigma(n) + prime(n), 4); \\ Michel Marcus, Jan 11 2014
CROSSREFS
Cf. A114081, subsequence of A114082.
Sequence in context: A208628 A205070 A169822 * A143475 A245948 A221004
KEYWORD
nonn
AUTHOR
Giovanni Resta, Feb 13 2006
STATUS
approved