A059745 - OEIS

%I #19 Oct 03 2023 22:23:07

%S 676,69696,94249,698896,5221225,6948496,522808225,617323716,942060249,

%T 637832238736,1086078706801,1615108015161,4051154511504,5265533355625,

%U 9420645460249,123862676268321,144678292876441,165551171155561,900075181570009,4099923883299904,94206450305460249

%N Palindromic squares of sporadic type.

%D 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]

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

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

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

%H Patrick De Geest, <a href="https://www.worldofnumbers.com/allsposqua.htm">Full List of the Sporadic Square Palindromes (SSP)</a>, part of Palindromic Squares website on WorldOfNumbers.

%H M. Keith, <a href="/A002778/a002778_1.pdf">Classification and enumeration of palindromic squares</a>, J. Rec. Math., 22 (No. 2, 1990), 124-132. [Annotated scanned copy] (Has many more terms)

%H William Rex Marshall, <a href="https://web.archive.org/web/20020614225321/http://www.geocities.com/williamrexmarshall/math/palsq.html">Table up to 10^40</a>

%F a(n) = A059744(n)^2. - _Hugo Pfoertner_, Oct 03 2023

%Y Cf. A059744, A016106, A028818, A060088.

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, Feb 21 2001

%E More terms from WorldOfNumbers website, communicated by _Hugo Pfoertner_, Oct 03 2023