A053225 - OEIS

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A053225

First differences of sigma(n) that are positive.

2, 1, 3, 6, 7, 5, 16, 10, 7, 21, 22, 4, 36, 11, 16, 42, 31, 6, 43, 22, 34, 54, 40, 76, 36, 26, 66, 48, 10, 108, 34, 8, 23, 60, 58, 48, 123, 40, 10, 16, 72, 106, 5, 140, 24, 60, 144, 56, 16, 132, 73, 61, 114, 106, 172, 106, 96, 126, 66, 216, 53, 56, 156, 127, 76, 204, 44, 36 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n) = A053222(A053224(n))`
	MAPLE	with (numtheory): seq( `if`((sigma(i) < sigma(i+1)), (sigma(i+1)-sigma(i)), print( )), i=1..139);
	CROSSREFS	`Cf. A000203, A053222, A053227.` `Sequence in context: A024930 A121966 A021472 * A050043 A113396 A112647` `Adjacent sequences: A053222 A053223 A053224 * A053226 A053227 A053228`
	KEYWORD	`nonn`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Jan 06 2000`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.