A111443 Least square beginning with the digit reversal of n^2.

1, 4, 9, 61009, 529, 63001, 9409, 4624, 1849, 1, 121, 441, 961, 69169, 522729, 652864, 982081, 423801, 16384, 4, 144, 484, 925444, 675684, 5262436, 676, 927369, 487204, 14884, 9, 169, 42016324, 9801, 651117289, 5221225, 692110864, 96314596

Offset

1,2

Comments

a(10n) = a(n). a(10^n) = 1. a(k) = k^2 if k^2 is a palindromic square. (Comment corrected by David Wasserman, Jan 21 2009)

Links

Table of n, a(n) for n=1..37.

Formula

a(n) = A018796(A004086(n^2)). [From David Wasserman, Jan 21 2009]

Example

a(8) = 4624 = 68^2 beginning with 46 the digit reversal of 64 = 8^2.

Crossrefs

Sequence in context: A258660 A260305 A229338 * A299118 A276272 A331450

Adjacent sequences: A111440 A111441 A111442 * A111444 A111445 A111446

Keyword

base,easy,less,nonn

Author

Amarnath Murthy, Aug 03 2005

Extensions

Corrected and extended by David Wasserman, Jan 21 2009

Status

approved