1,2

Numbers n such that A027622(n) is prime.

P. De Geest, Palindromic Quasi_Under_Squares of the form n+(n+1)^2

n=1: n + (n+1)^2 + (n+2)^3 + (n+3)^4 + (n+4)^5=3413=A027886(1),

n=7: n + (n+1)^2 + (n+2)^3 + (n+3)^4 + (n+4)^5=171851=A027886(2),

n=11: n + (n+1)^2 + (n+2)^3 + (n+3)^4 + (n+4)^5=800143=A027886(3).

Cf. A027622, A027886.

Adjacent sequences: A027827 A027828 A027829 this_sequence A027831 A027832 A027833

Sequence in context: A118072 A076855 A160054 this_sequence A134043 A102373 A002643

nonn

Patrick De Geest (pdg(AT)worldofnumbers.com)

Edited by N. J. A. Sloane (njas(AT)research.att.com), May 21 2008 at the suggestion of R. J. Mathar