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A020880 Number of strong elementary edge-subgraphs in Moebius ladder M_n. 0
6, 21, 26, 81, 129, 349, 650, 1614, 3281, 7772, 16565, 38265, 83635, 190656, 422266, 955967, 2131986, 4809229, 10764221, 24235939, 54347662, 122246248, 274396853, 616899656, 1385407029 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..26.

J. P. McSorley, Counting structures in the Moebius ladder, Discrete Math., 184 (1998), 137-164.

CROSSREFS

Sequence in context: A323917 A229498 A164698 * A046467 A132184 A143322

Adjacent sequences:  A020877 A020878 A020879 * A020881 A020882 A020883

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(6)-a(26) from Sean A. Irvine, May 01 2019

STATUS

approved

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Last modified July 23 01:27 EDT 2019. Contains 325228 sequences. (Running on oeis4.)