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A185017 Characteristic function of 7. 14
0, 0, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

Number of connected 2-regular (simple) graphs with girth exactly 7.

The Euler transformation of this sequence is A082784.

LINKS

Table of n, a(n) for n=0..101.

FORMULA

a(n) = A185117(n) - A185118(n).

CROSSREFS

Characteristic function of g: A000007 (g=0), A063524 (g=1), A185012 (g=2), A185013 (g=3), A185014 (g=4), A185015 (g=5), A185016 (g=6), this sequence (g=7).

Sequence in context: A185014 A185013 A185012 * A000007 A240351 A249832

Adjacent sequences:  A185014 A185015 A185016 * A185018 A185019 A185020

KEYWORD

nonn,easy

AUTHOR

Jason Kimberley, Oct 14 2011

STATUS

approved

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Last modified June 2 18:17 EDT 2020. Contains 334787 sequences. (Running on oeis4.)