1,1

From a puzzle proposed by Marc LeBrun.

Table of n, a(n) for n=1..55.

If n = 9 = 3^2, then a(n) = 11^2 = 121 (since 11 is the thiord prime after 3).

Sequence in context: A038976 A106714 A106819 * A066367 A098036 A127269

Adjacent sequences: A045965 A045966 A045967 * A045969 A045970 A045971

easy,nonn

N. J. A. Sloane

More terms from David W. Wilson

Erroneous linear recurrence deleted by Harvey P. Dale, May 07 2018

approved