A046370 Numbers with exactly 4 palindromic prime factors (counted with multiplicity).

16, 24, 36, 40, 54, 56, 60, 81, 84, 88, 90, 100, 126, 132, 135, 140, 150, 189, 196, 198, 210, 220, 225, 250, 294, 297, 308, 315, 330, 350, 375, 441, 462, 484, 490, 495, 525, 550, 625, 686, 693, 726, 735, 770, 808, 825, 875, 1029, 1048, 1078, 1089, 1155, 1208

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 A014613.

Cf. A046402.

Extensions

Offset changed by Andrew Howroyd, Aug 14 2024