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A115743 Squares that are the product of 2 palindromes greater than 1. 3
4, 9, 16, 25, 36, 49, 64, 81, 121, 484, 1089, 1764, 1936, 2401, 2704, 3025, 4356, 5929, 6084, 7744, 9801, 10201, 12321, 14641, 17161, 19881, 22801, 25921, 27225, 29241, 32761, 36481, 40804, 44944, 49284, 53824, 58564, 63504, 68644, 69696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Are most terms of the form p^2 where p is a palindrome? - David A. Corneth, May 25 2021

LINKS

David A. Corneth, Table of n, a(n) for n = 1..13971 (terms <= 10^15)

EXAMPLE

6084 = 78^2 and 6084 = 9*676.

MATHEMATICA

With[{nn=50000}, Select[Union[Select[Times@@@Tuples[Select[Range[2, nn], PalindromeQ], 2], IntegerQ[ Sqrt[ #]]&]], #<=2 nn&]] (* Harvey P. Dale, Aug 21 2022 *)

CROSSREFS

Cf. A014186, A115683, A115744, A115745.

Sequence in context: A050749 A096599 A016073 * A014186 A052062 A052046

Adjacent sequences:  A115740 A115741 A115742 * A115744 A115745 A115746

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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Last modified September 29 16:10 EDT 2022. Contains 357090 sequences. (Running on oeis4.)