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A031281 a(n)=(# 1's)-(# 0's) in first n terms of A031269. 0
1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 3, 4, 5, 5, 5, 6, 5, 5, 5, 5, 6, 5, 5, 5, 6, 6, 7, 7, 7, 6, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 5, 5, 6, 7, 7, 7, 8, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 7, 8, 7, 7, 8, 8, 8, 9, 10, 10, 9, 9, 10, 11, 11, 11, 11, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..86.

CROSSREFS

Sequence in context: A115265 A105223 A025859 * A203181 A113793 A289499

Adjacent sequences:  A031278 A031279 A031280 * A031282 A031283 A031284

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 13 10:50 EST 2019. Contains 329093 sequences. (Running on oeis4.)