

A033934


a(n) = (10^n+1)^2.


13



4, 121, 10201, 1002001, 100020001, 10000200001, 1000002000001, 100000020000001, 10000000200000001, 1000000002000000001, 100000000020000000001, 10000000000200000000001, 1000000000002000000000001, 100000000000020000000000001, 10000000000000200000000000001
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OFFSET

0,1


COMMENTS

The members of this sequence are both perfect squares and palindromes. Therefore A002779 is an infinite sequence. [Ant King, Jun 26 2011]


LINKS



FORMULA



MATHEMATICA

(10^Range[0, 20]+1)^2 (* or *) LinearRecurrence[{111, 1110, 1000}, {4, 121, 10201}, 20] (* Harvey P. Dale, Feb 16 2016 *)


CROSSREFS



KEYWORD

nonn,base,easy


AUTHOR



EXTENSIONS



STATUS

approved



