A133901 Numbers in A128921 whose square is not a palindrome.

33, 99, 1119111, 10110901101, 11110901111, 101109901101, 1011109011101, 1110109010111, 10111099011101, 100110090011001, 100111090111001, 101011090110101, 111001090100111

Offset

1,1

Comments

Also terms of A128921 that do not consist completely of digits 0, 1, 2, however excluding A128921(4) = 3.

Conjecture: Sequence is infinite.

Links

Table of n, a(n) for n=1..13.

Example

A128921(41) = 1119111, 1119111^2 = 1252409430321 is not a palindrome, but its reverse is also a square: 1230349042521 = 1109211^2.

Crossrefs

Cf. A128921 (palindromes p such that reverse of p^2 is also a square), A002113 (palindromes in base 10), A057135 (palindromes whose square is a palindrome), A057136 (palindromes whose square root is a palindrome).

Sequence in context: A098441 A032650 A284986 * A008880 A370481 A045613

Adjacent sequences: A133898 A133899 A133900 * A133902 A133903 A133904

Keyword

nonn,base

Author

Klaus Brockhaus and Zak Seidov, Sep 29 2007

Status

approved