A115743 Squares that are the product of 2 palindromes greater than 1.
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
Offset: 1
Examples
6084 = 78^2 and 6084 = 9*676.
Links
- David A. Corneth, Table of n, a(n) for n = 1..13971 (terms <= 10^15)
Programs
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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 *)
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