A046400 Numbers with exactly 2 distinct palindromic prime factors.

6, 10, 14, 15, 21, 22, 33, 35, 55, 77, 202, 262, 302, 303, 362, 382, 393, 453, 505, 543, 573, 626, 655, 706, 707, 746, 755, 766, 905, 917, 939, 955, 1057, 1059, 1111, 1119, 1149, 1267, 1337, 1441, 1454, 1514, 1565, 1574, 1594, 1661, 1765, 1838, 1858, 1865

Offset

1,1

Links

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

Mathematica

Select[Range[2000], (f = FactorInteger[#])[[;; , 2]] == {1, 1} && And @@ PalindromeQ /@ f[[;; , 1]] &] (* Amiram Eldar, Apr 03 2021 *)

Crossrefs

Cf. A001358, A046368.

Sequence in context: A180074 A338905 A093772 * A100660 A088709 A225706

Adjacent sequences: A046397 A046398 A046399 * A046401 A046402 A046403

Keyword

nonn,base

Author

Patrick De Geest, Jun 15 1998

Status

approved