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A175007 Positions of nonnegative terms in A131389. 1
1, 2, 3, 5, 6, 9, 11, 12, 14, 17, 18, 20, 22, 25, 26, 29, 30, 33, 34, 36, 38, 40, 42, 45, 47, 48, 50, 52, 54, 57, 58, 60, 62, 64, 66, 69, 70, 73, 74, 76, 78, 80, 82, 84, 86, 89, 91, 93, 95, 96, 98, 100, 102, 104, 106, 109, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Is a(n+1)-a(n) always 1,2 or 3?

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

The first 20 terms of A131389 are

0,1,2,-1,3,4,-2,-3,6,-4,5,7,-5,8,-6,-7,9,10,-8,11.

Positions occupied by nonnegatives are

1,2,3,5,6,9,11,12,14,17,18,20.

CROSSREFS

Cf. A131389, A175008.

Sequence in context: A026461 A026168 A286402 * A284685 A113238 A104214

Adjacent sequences:  A175004 A175005 A175006 * A175008 A175009 A175010

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 03 2010

STATUS

approved

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Last modified July 11 18:00 EDT 2020. Contains 335644 sequences. (Running on oeis4.)