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 A027725 Palindromes of form k^2 + k + 8. 3
 8, 878, 41014, 81518, 8558558, 8617168, 415242514, 874414478, 88279997288, 8035521255308, 8053537353508, 8942435342498, 8984014104898, 82375268486257328, 8563985811185893658, 41023644811311844632014, 87279499176567199497278, 462070049490878094940070264, 467190356216898612653091764 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Palindromes h such that 4*h - 31 is a square. - Bruno Berselli, Aug 29 2018 LINKS Table of n, a(n) for n=1..19. P. De Geest, Palindromic Quasi_Over_Squares of the form n^2+(n+X) MATHEMATICA palQ[n_] := Block[{d = IntegerDigits[n]}, d == Reverse[d]]; f[n_] := n^2 + n + 8; Select[f@ Range[0, 3*10^5], palQ] (* Giovanni Resta, Aug 29 2018 *) CROSSREFS Cf. A027724, A027693, A027723, A027727. Sequence in context: A360195 A262379 A175411 * A265239 A290023 A112578 Adjacent sequences: A027722 A027723 A027724 * A027726 A027727 A027728 KEYWORD nonn,base AUTHOR Patrick De Geest EXTENSIONS a(14)-a(19) from Giovanni Resta, Aug 29 2018 STATUS approved

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Last modified September 7 13:22 EDT 2024. Contains 375730 sequences. (Running on oeis4.)