id:A084831 - OEIS Search Results

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Numbers n such that sum of odd divisors and sum of even divisors are both palindromic.

+0
2

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; listen)

	OFFSET	`1,2`
	COMMENT	`Primes of form 210^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 this_sequence A037406 A024647 A024648` `Adjacent sequences: A084828 A084829 A084830 this_sequence A084832 A084833 A084834`
	KEYWORD	`base,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jun 05 2003`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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