A027714 Numbers k such that k^2+k+3 is a palindrome.

0, 1, 2, 5, 19, 23, 60, 71, 175, 179, 184, 243, 753, 2431, 6154, 23111, 30947, 73188, 75146, 230663, 237721, 598350, 3093852, 5492899, 17605724, 18886025, 30909092, 62127180, 76675186, 177865385, 230098566, 309230287, 549199524, 589167859, 726714741

Offset

1,3

Links

Giovanni Resta, Table of n, a(n) for n = 1..50

P. De Geest, Palindromic Quasi_Over_Squares of the form n^2+(n+X)

Mathematica

npalQ[n_]:=Module[{c=n^2+n+3}, c==IntegerReverse[c]]; Select[Range[ 0, 31*10^5], npalQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Aug 15 2016 *)

Crossrefs

Cf. A027715, A027688, A027752, A027753, A027712, A027716.

Sequence in context: A045368 A215426 A215277 * A219178 A184868 A077317

Adjacent sequences: A027711 A027712 A027713 * A027715 A027716 A027717

Keyword

nonn,base

Author

Patrick De Geest

Extensions

More terms from Giovanni Resta, Aug 29 2018

Status

approved