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A027714 Numbers k such that k^2+k+3 is a palindrome. 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
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
Sequence in context: A045368 A215426 A215277 * A219178 A184868 A077317
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
More terms from Giovanni Resta, Aug 29 2018
STATUS
approved

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Last modified May 26 07:52 EDT 2024. Contains 372807 sequences. (Running on oeis4.)