A059745 Palindromic squares of sporadic type.

676, 69696, 94249, 698896, 5221225, 6948496, 522808225, 617323716, 942060249, 637832238736, 1086078706801, 1615108015161, 4051154511504, 5265533355625, 9420645460249, 123862676268321, 144678292876441, 165551171155561, 900075181570009, 4099923883299904, 94206450305460249

Offset

1,1

References

C. Ashbacher, More on palindromic squares, J. Rec. Math. 22, no. 2 (1990), 133-135. [A scan of the first page of this article is included with the last page of the Keith (1990) scan]

J. K. R. Barnett, "Tables of Square Palindromes in Bases 2 and 10," Journal of Recreational Mathematics, 23:1, pp. 13-18, 1991.

M. Keith, "Classification and Enumeration of Palindromic Squares," Journal of Recreational Mathematics, 22:2, pp. 124-132, 1990.

R. Ondrejka, "A Palindrome (151) of Palindromic Squares," Journal of Recreational Mathematics, 20:1, pp. 68-71, 1988.

Links

Table of n, a(n) for n=1..21.

Patrick De Geest, Full List of the Sporadic Square Palindromes (SSP), part of Palindromic Squares website on WorldOfNumbers.

M. Keith, Classification and enumeration of palindromic squares, J. Rec. Math., 22 (No. 2, 1990), 124-132. [Annotated scanned copy] (Has many more terms)

William Rex Marshall, Table up to 10^40

Formula

a(n) = A059744(n)^2. - Hugo Pfoertner, Oct 03 2023

Crossrefs

Cf. A059744, A016106, A028818, A060088.

Sequence in context: A238252 A264338 A348319 * A028818 A203541 A014759

Adjacent sequences: A059742 A059743 A059744 * A059746 A059747 A059748

Keyword

nonn,base

Author

N. J. A. Sloane, Feb 21 2001

Extensions

More terms from WorldOfNumbers website, communicated by Hugo Pfoertner, Oct 03 2023

Status

approved