A046487 Palindromes k such that the sum of the first palindromes up to k is a palindrome.

1, 2, 3, 33, 77, 383, 21512

Offset: 1

Author

Patrick De Geest, Sep 15 1998

Keywords

• nonn
• hard
• base

Examples

			a(n)=77 so 1+2+3+4+5+6+7+8+9+11+22+33+44+55+66+77 = 353.
		

Links

• P. De Geest, World!Of Numbers

Crossrefs

Cf. A002113, A046486, A046488.

Formula

a(n) = A002113(1+A046486(n)). - R. J. Mathar, Sep 09 2015

Extensions

Offset changed to 1 by R. J. Mathar, Sep 09 2015