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A210690 Erroneous version of A000421. 0
1, 2, 6, 20, 93 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Cadogan, C. C. Graph-lattices and the enumeration of linear graphs. 1970 Proc. Louisiana Conf. on Combinatorics, Graph Theory and Computing (Louisiana State Univ., Baton Rouge, La., 1970) pp. 61--86 Louisiana State Univ., Baton Rouge, La. MR0269553 (42 #4448).

LINKS

Table of n, a(n) for n=1..5.

CROSSREFS

Sequence in context: A000421 A009244 A104985 * A079575 A078564 A079576

Adjacent sequences:  A210687 A210688 A210689 * A210691 A210692 A210693

KEYWORD

dead

AUTHOR

N. J. A. Sloane, Mar 30 2012

STATUS

approved

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Last modified October 6 19:00 EDT 2022. Contains 357270 sequences. (Running on oeis4.)