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A050236 Indices of consecutive squares palindromic primes; x such that x^2+(x+1)^2 is palindromic and prime. 1
1, 9, 12, 1262 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..4.

P. De Geest, Palindromic Sums of Squares of Consecutive Integers

C. Rivera, Source 3

Eric Weisstein's World of Mathematics, Palindromic Prime

MATHEMATICA

Flatten[Position[Total/@Partition[Range[1300]^2, 2, 1], _?(PrimeQ[#] && IntegerDigits[#]==Reverse[IntegerDigits[#]]&)]] (* Harvey P. Dale, Dec 09 2014 *)

CROSSREFS

Cf. A050239.

Sequence in context: A188001 A273614 A281224 * A193995 A070607 A191891

Adjacent sequences:  A050233 A050234 A050235 * A050237 A050238 A050239

KEYWORD

nonn,nice,hard,base

AUTHOR

Eric W. Weisstein

EXTENSIONS

No others < 20000000000. - Patrick De Geest, Aug 1999

STATUS

approved

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Last modified July 17 01:41 EDT 2018. Contains 312693 sequences. (Running on oeis4.)