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A059441 Triangle T(n,k) (n >= 1, 0<=k<=n-1) giving number of regular labeled graphs with n nodes and degree k, read by rows. 4
1, 1, 1, 1, 0, 1, 1, 3, 3, 1, 1, 0, 12, 0, 1, 1, 15, 70, 70, 15, 1, 1, 0, 465, 0, 465, 0, 1, 1, 105, 3507, 19355, 19355, 3507, 105, 1, 1, 0, 30016, 0, 1024380, 0, 30016, 0, 1, 1, 945, 286884, 11180820, 66462606, 66462606, 11180820, 286884, 945, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,8

REFERENCES

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 279.

LINKS

Table of n, a(n) for n=1..55.

B. D. McKay, Applications of a technique for labeled enumeration, Congress. Numerantium, 40 (1983), 207-221. See page 216.

EXAMPLE

1;

1,   1;

1,   0,    1;

1,   3,    3,     1;

1,   0,   12,     0,     1;

1,  15,   70,    70,    15,    1;

1,   0,  465,     0,   465,    0,   1;

1, 105, 3507, 19355, 19355, 3507, 105, 1;

1,   0,   30016, 0, 1024380,....;

1, 945, 286884, 11180820, 66462606,...;

1,0,3026655, 0, 5188453830,...;

CROSSREFS

Diagonals give A001205, A002829, A005815.

Sequence in context: A283798 A065551 A283797 * A186028 A225054 A059790

Adjacent sequences:  A059438 A059439 A059440 * A059442 A059443 A059444

KEYWORD

tabl,nice,nonn

AUTHOR

N. J. A. Sloane, Feb 01 2001

EXTENSIONS

a(37)-a(55) from Andrew Howroyd, Aug 25 2017

STATUS

approved

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Last modified November 15 07:53 EST 2018. Contains 317225 sequences. (Running on oeis4.)