A046378 Palindromes with exactly 4 palindromic prime factors (counted with multiplicity).

88, 484, 525, 686, 808, 2662, 3773, 3993, 4444, 6666, 9999, 14641, 24442, 34643, 36663, 40804, 52525, 134431, 224422, 336633, 1234321, 1596951, 2060602, 3090903, 11333311, 14699641, 22888822, 66888866, 104060401, 125888521, 134969431, 367888763, 413979314

Offset

1,1

Links

Lars Blomberg, Table of n, a(n) for n = 1..320, terms < 10^16.

Example

The palindrome 1596951 is a term since it has 4 factors 3^2 191 929, all palindromic.

Crossrefs

Cf. A046330, A046410.

Sequence in context: A234777 A234770 A052049 * A187176 A236009 A236003

Adjacent sequences: A046375 A046376 A046377 * A046379 A046380 A046381

Keyword

nonn,base

Author

Patrick De Geest, Jun 15 1998

Extensions

More terms from Lars Blomberg, Nov 06 2015

Status

approved