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A084831 Numbers n such that sum of odd divisors and sum of even divisors are both palindromic. 1
1, 2, 3, 4, 5, 6, 7, 43, 81, 86, 162, 201, 205, 211, 221, 241, 251, 271, 281, 325, 333, 344, 365, 422, 433, 443, 463, 482, 489, 519, 559, 633, 650, 685, 730, 793, 803, 827, 857, 866, 877, 886, 887, 1419, 1505, 1841, 2021, 2111, 2221, 2305, 2441, 2551, 2561, 2611 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Primes of form 2*10^n + R(n) (A056700) and 2/9*(-1+10^n)-1 (A084832) are members.

EXAMPLE

a(11)=162 because sum of even divisors is 242 and sum of odd divisors is 121.

CROSSREFS

Cf. A000593, A056700, A084832.

Sequence in context: A024645 A004847 A024646 * A037406 A024647 A024648

Adjacent sequences:  A084828 A084829 A084830 * A084832 A084833 A084834

KEYWORD

base,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jun 05 2003

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Last modified February 15 12:59 EST 2012. Contains 205788 sequences.