A046374 Odd numbers with exactly 4 palindromic prime factors (counted with multiplicity).

81, 135, 189, 225, 297, 315, 375, 441, 495, 525, 625, 693, 735, 825, 875, 1029, 1089, 1155, 1225, 1375, 1617, 1715, 1815, 1925, 2401, 2541, 2695, 2727, 3025, 3537, 3773, 3993, 4077, 4235, 4545, 4887, 5157, 5895, 5929, 6363, 6655, 6795, 7575, 8145, 8253

Offset: 1

Author

Patrick De Geest, Jun 15 1998

Keywords

• nonn
• base

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..1000

Crossrefs

Intersection of A033620 and A046317.

Cf. A046406.

Extensions

Offset changed by Andrew Howroyd, Aug 14 2024