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A111408 f(f(n+1)-f(f(n), where f(m) = sigma(m) = A000203(m). 0
1, 3, 3, 1, 4, 16, -13, 9, -10, 25, -11, 28, -32, 36, 0, -28, 7, 17, -14, 54, -33, 28, -31, 108, -136, 64, -6, 30, -48, 123, -132, 41, 20, -4, 4, -12, -52, 108, -48, 114, -138, 156, -168, 140, -56, 27, -71, 100, -144, 48, 67, -24, -51, 240, -165, 165, -174, 48, -66, 312, -384, 156, -42, -82, 96, 179, -277, 186 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A079081 A199775 A193740 * A092674 A111945 A002143

Adjacent sequences:  A111405 A111406 A111407 * A111409 A111410 A111411

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Nov 12 2005

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Last modified February 16 06:44 EST 2012. Contains 205864 sequences.