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A030681 Smallest nontrivial extension of n-th palindromic prime which is a square. 2
25, 36, 529, 729, 1156, 101124, 131044, 15129, 181476, 191844, 3136, 35344, 373321, 383161, 727609, 7573504, 7873636, 797449, 919681, 929296, 1030153216, 1050148836, 10601536, 1131111424, 1141155961, 124211025 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

MATHEMATICA

d[n_]:=IntegerDigits[n]; Table[i=1; While[!IntegerQ[Sqrt[x=FromDigits[Flatten[{d[n], d[i]}]]]], i++]; x, {n, Select[Prime[Range[1500]], Reverse[x=d[#]]==x &]}] (* Jayanta Basu, May 24 2013 *)

CROSSREFS

Cf. A030682.

Sequence in context: A077437 A077676 A030671 * A167363 A035383 A179803

Adjacent sequences:  A030678 A030679 A030680 * A030682 A030683 A030684

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified November 16 04:48 EST 2018. Contains 317252 sequences. (Running on oeis4.)