A078337 Palindromes which are a nontrivial product of 2 palindromes (which need not be distinct).

4, 6, 8, 9, 22, 33, 44, 55, 66, 77, 88, 99, 121, 202, 222, 242, 262, 282, 303, 333, 363, 393, 404, 424, 444, 464, 484, 505, 555, 606, 616, 626, 636, 646, 666, 686, 696, 707, 777, 808, 828, 848, 868, 888, 909, 939, 969, 999, 1111, 1221, 1331, 1441, 1551, 1661

Offset

1,1

Links

Giovanni Resta, Table of n, a(n) for n = 1..10000

Mathematica

palQ[n_] := Reverse[x = IntegerDigits[n]] == x; t1 = Rest[Select[Range[1670], palQ[#] &]]; Intersection[t1, Union[Flatten[Table[i*j, {i, t1}, {j, t1}]]]] (* Jayanta Basu, Jun 15 2013 *)

Crossrefs

Cf. A002113, A078895.

Sequence in context: A366826 A161600 A032350 * A046351 A161732 A066307

Adjacent sequences: A078334 A078335 A078336 * A078338 A078339 A078340

Keyword

base,nonn,easy

Author

Amarnath Murthy, Jun 07 2002

Extensions

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003

Status

approved