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A078337 Palindromes which are a nontrivial product of 2 palindromes (which need not be distinct). 3
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

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. A078895.

Sequence in context: A162738 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

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)