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A046712 From the Bruck-Ryser theorem: n == 1 or 2 (mod 4) which are not the sum of 2 squares. +0
1
6, 14, 21, 22, 30, 33, 38, 42, 46, 54, 57, 62, 66, 69, 70, 77, 78, 86, 93, 94, 102, 105, 110, 114, 118, 126, 129, 133, 134, 138, 141, 142, 150, 154, 158, 161, 165, 166, 174, 177, 182, 186, 189, 190, 198, 201, 206, 209, 210, 213, 214, 217, 222, 230, 237, 238 (list; graph; listen)
OFFSET

1,1

REFERENCES

R. H. Bruck and H. J. Ryser, The nonexistence of certain projective planes, Canad. J. Math., 1 (1949), 88-93.

M. Hall, Jr., Combinatorial Theory, Theorem 12.3.2.

LINKS

Index entries for sequences related to sums of squares

CROSSREFS

Sequence in context: A064708 A064709 A118129 this_sequence A162823 A020171 A122784

Adjacent sequences: A046709 A046710 A046711 this_sequence A046713 A046714 A046715

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from James A. Sellers (sellersj(AT)math.psu.edu)

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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