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

Author

Zak Seidov, May 16 2010

Keywords

• base
• nonn

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

• Zak Seidov, A175440

Crossrefs

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