OFFSET
1,2
COMMENTS
a(50) > 10^40. - Patrick De Geest, May 25 2021
LINKS
Patrick De Geest, Table of n, a(n) for n = 1..49
Patrick De Geest, Palindromic Sums of Squares of Consecutive Integers
Patrick De Geest, Palindromic Centered Polygonal Numbers
FORMULA
a(n) = (4*m^2 - 4*m + 2)/2 = (m-1)^2 + m^2 or a(n) = (4*n^2 + 4*n + 2)/2 = n^2 + (n+1)^2 with n = m - 1.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
a(18)-a(21) from Donovan Johnson, Aug 26 2012
a(1)=1 added by Philip Mizzi, Sep 02 2019
a(22)-a(49) from Patrick De Geest, May 25 2021
STATUS
approved