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A046378 Palindromes with exactly 4 palindromic prime factors (counted with multiplicity). 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 17 01:41 EDT 2018. Contains 312693 sequences. (Running on oeis4.)