A035135 Cubefree composite palindromes.

4, 6, 9, 22, 33, 44, 55, 66, 77, 99, 111, 121, 141, 161, 171, 202, 212, 222, 242, 252, 262, 282, 292, 303, 323, 333, 363, 393, 404, 414, 434, 444, 454, 474, 484, 494, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 606, 626, 636, 646, 666, 676, 707, 717

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Cubefree.

Mathematica

cufQ[n_]:=Max[Transpose[FactorInteger[n]][[2]]]<=2; palQ[n_]:=FromDigits[Reverse[IntegerDigits[n]]]==n; Select[Range[2, 718], !PrimeQ[#] && cufQ[#] && palQ[#] &] (* Jayanta Basu, May 12 2013 *)

Crossrefs

Intersection of A002113, A002808 and A004709.

Cf. A035133, A035134.

Sequence in context: A257842 A239307 A137253 * A046338 A118690 A084994

Adjacent sequences: A035132 A035133 A035134 * A035136 A035137 A035138

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 1998

Status

approved