A116049 n+sigma(n)+sigma(sigma(n)) is a palindrome.

1, 2, 15, 24, 25, 29, 43, 46, 57, 65, 95, 119, 121, 157, 173, 531, 1791, 2072, 2080, 2169, 2200, 2205, 2267, 2411, 2413, 2444, 2483, 2553, 2590, 2623, 2632, 3329, 3397, 3442, 3454, 3529, 3532, 3583, 3794, 4131, 4229, 4314, 4460, 4596, 4603

Offset

1,2

Links

Table of n, a(n) for n=1..45.

Example

2267 + sigma(2267) + sigma(sigma(2267)) = 11311.

Crossrefs

Sequence in context: A280288 A153712 A153711 * A184236 A023651 A116028

Adjacent sequences: A116046 A116047 A116048 * A116050 A116051 A116052

Keyword

nonn,base

Author

Giovanni Resta, Feb 13 2006

Status

approved