A175440 Terms in A177950 that are not in A002778.

9, 33, 48, 66, 87, 99, 117, 216, 273, 288, 297, 333, 484, 513, 528, 666, 783, 819, 999, 1323, 1331, 1452, 1474, 1602, 2178, 2622, 3333, 4884, 4961, 6666, 7161, 7575, 9999, 10989, 11979, 12969, 14652, 14733, 15972, 20402, 21021, 21534, 21648, 23331

Offset

1,1

Comments

Terms n in A177950 such that n^2 is palindrome are also in A002778.

This sequence consists of numbers (more interesting?) that are in A177950 but not in A002778.

Notice that most terms are multiples of 3, while some are not: 484, 1331, 1474, 4961, 20402, 48884, 122221, 188887, 217822, 467126, 477773, 484484, 506506, 525503, 718189, 808808, 1461262, 1729408, 2004002, 2317315, 2920819, 4840484.

Links

Table of n, a(n) for n=1..44.

Zak Seidov, A175440

Crossrefs

Cf. A002778 Numbers whose square is a palindrome, A177950 Numbers n dividing n^2 with digits reversed.

Sequence in context: A145849 A111045 A020226 * A280405 A111351 A065064

Adjacent sequences: A175437 A175438 A175439 * A175441 A175442 A175443

Keyword

base,nonn

Author

Zak Seidov, May 16 2010

Status

approved