

A128425


Primes that are the genus of some complete graph.


1



2, 3, 5, 11, 13, 23, 29, 43, 59, 73, 83, 137, 151, 173, 181, 239, 257, 347, 463, 653, 683, 809, 859, 1093, 1151, 1171, 1231, 1553, 1669, 1693, 1789, 1913, 2311, 2423, 2837, 3121, 3251, 3623, 3943, 4583, 4861, 5023, 5483, 5569, 5743, 6053
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OFFSET

1,1


REFERENCES

G. Ringel and J. W. T. Youngs, Solution of the Heawood mapcoloring problem, Proc. Nat. Acad. Sci. USA, 60 (1968), 438445.


LINKS

Table of n, a(n) for n=1..46.
Eric Weisstein's World of Mathematics, Complete Graph.


FORMULA

A000933 INTERSECTION A000040. Primes of the form ceiling((n3)*(n4)/12) for n>=3.


CROSSREFS

Cf. A000040, A000933.
Sequence in context: A020607 A235631 A180640 * A175565 A262831 A036960
Adjacent sequences: A128422 A128423 A128424 * A128426 A128427 A128428


KEYWORD

easy,nonn


AUTHOR

Jonathan Vos Post, May 04 2007


STATUS

approved



