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A029723 Trace of Frobenius of the reduction mod 2 of the elliptic curve C / L, L a lattice with Gram matrix [ 4 1; 1 2n ]. +0
1
1, 1, 3, 1, 5, 9, 3, 1, 21, 7, 13, 13, 5 (list; graph; listen)
OFFSET

0,3

FORMULA

Of form sqrt(2^(h(1-8n)+2)-m^2(8n-1)), with m odd.

CROSSREFS

Sequence in context: A094353 A129801 A128821 this_sequence A055199 A122366 A103327

Adjacent sequences: A029720 A029721 A029722 this_sequence A029724 A029725 A029726

KEYWORD

nonn

AUTHOR

Eric Rains (rains(AT)caltech.edu)

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.


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