id:A053226 - OEIS Search Results

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n for which sigma(n) > sigma(n+1).

+0
12

4, 6, 8, 10, 12, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 45, 46, 48, 50, 52, 54, 56, 58, 60, 64, 66, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 105, 106, 108, 110, 112, 114, 116, 117, 118, 120, 122, 124, 126, 128, 130 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	MAPLE	with(numtheory): seq( `if`((sigma(i) > sigma(i+1)), i, print( )), i=1..139);
	CROSSREFS	`Cf. A000203, A053222, A053224, A053238.` `Sequence in context: A167179 A020645 A051756 this_sequence A074827 A068354 A075027` `Adjacent sequences: A053223 A053224 A053225 this_sequence A053227 A053228 A053229`
	KEYWORD	`nonn`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Jan 06 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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