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A185015 Characteristic function of 5. 16
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Number of connected 2-regular (simple) graphs with girth exactly 5.

The Euler transformation of this sequence is A079998.

LINKS

Table of n, a(n) for n=0..85.

FORMULA

a(n) = A185115(n) - A185116(n).

CROSSREFS

Characteristic function of g: A000007 (g=0), A063524 (g=1), A185012 (g=2), A185013 (g=3), A185014 (g=4), this sequence (g=5), A185016 (g=6), A185017 (g=7).

Sequence in context: A057427 A178334 A185016 * A185014 A185013 A185012

Adjacent sequences:  A185012 A185013 A185014 * A185016 A185017 A185018

KEYWORD

nonn,easy

AUTHOR

Jason Kimberley, Sep 30 2011

STATUS

approved

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Last modified March 28 07:59 EDT 2020. Contains 333079 sequences. (Running on oeis4.)