The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A185118

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A185118

Number of connected 2-regular simple graphs on n vertices with girth at least 8.
(history; published version)

#19 by Alois P. Heinz at Sat Jun 15 18:41:37 EDT 2024

STATUS

proposed

approved

#18 by Elmo R. Oliveira at Sat Jun 15 18:38:49 EDT 2024

STATUS

editing

proposed

#17 by Elmo R. Oliveira at Sat Jun 15 18:36:01 EDT 2024

LINKS

Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/C_girth_ge_8">Connected regular graphs with girth at least 8</a>.

Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/C_k-reg_girth_ge_g_index">Index of sequences counting connected k-regular simple graphs with girth at least g</a>.

STATUS

proposed

editing

#16 by Elmo R. Oliveira at Wed May 29 21:06:23 EDT 2024

STATUS

editing

proposed

#15 by Elmo R. Oliveira at Wed May 29 21:02:50 EDT 2024

COMMENTS

Decimal expansion of 90000001/900000000. - Elmo R. Oliveira, May 29 2024

LINKS

<a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1).

FORMULA

a(0)=1; for 0 < n < 8 a(n)=0; for n >= 8 , , a(n)=1.

G.f.: (x^8-x+1)/(1-x). - Elmo R. Oliveira, May 29 2024

STATUS

approved

editing

#14 by Charles R Greathouse IV at Thu May 01 02:36:25 EDT 2014

AUTHOR

_Jason Kimberley, _, Jan 28 2011

Discussion

Thu May 01

02:36

OEIS Server: https://oeis.org/edit/global/2189

#13 by T. D. Noe at Thu Dec 01 12:03:08 EST 2011

STATUS

proposed

approved

#12 by Jason Kimberley at Thu Dec 01 08:30:28 EST 2011

STATUS

editing

proposed

#11 by Jason Kimberley at Thu Dec 01 08:29:36 EST 2011

LINKS

Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/C_girth_ge_8">Connected regular graphs with girth at least 8</a>

CROSSREFS

Connected k-regular simple graphs with girth at least 8: A186728 (any k), A186718 (triangle); specific k: this sequence (k=2), A014376 (k=3), TBA (k=4).

STATUS

approved

editing

#10 by N. J. A. Sloane at Tue Nov 22 02:17:56 EST 2011

STATUS

proposed

approved