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A076435 Number of strongly regular simple graphs on n nodes. 3
1, 2, 2, 4, 3, 6, 2, 6, 5, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Strongly Regular Graph

EXAMPLE

1: K_1 (1 graph)

2: \bar K_2, P_2 = K_2 (2 graph)

3: \bar K_3, C_3 = K_3 (2 graphs)

4: \bar K_4, 2P_2, C_4, K_4 (4 graphs)

5: C_5, \bar K_5, K_5 (3 graphs)

6: 2C_3, K_6, \bar K_6, 3P_2, Ci_6(1,2), K_{3,3} (6 graphs)

Here, \bar denotes the graph complement and Ci_n(...) a circular graph.

CROSSREFS

Cf. A005176, A076434, A088741.

Sequence in context: A324655 A275735 A328835 * A257010 A156864 A059975

Adjacent sequences:  A076432 A076433 A076434 * A076436 A076437 A076438

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Oct 11 2002

EXTENSIONS

a(10) from Eric W. Weisstein, Oct 30 2017

STATUS

approved

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Last modified June 19 00:04 EDT 2021. Contains 345125 sequences. (Running on oeis4.)