Search: id:A007281
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%I A007281 M0605
%S A007281 1,1,2,2,5,4,8,6,1,0,1,0,0
%N A007281 Number of `(n,2)'-sequences of length 2n.
%D A007281 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007281 H.-Y. Song and S. W. Golomb, Generalized Welch-Costas sequences and their 
               application to Vatican arrays, in Proc. 2nd International Conference 
               on Finite Fields: Theory, Algorithms and Applications (Las Vegas 
               1993) Contemp. Math. vol. 168 348 1994.
%D A007281 Hong-Yeop Song and J. Bok Lee, "On (n,k)-sequences", Discrete Appl. Math. 
               105 (2000), no. 1-3, 183-192.
%Y A007281 Sequence in context: A162200 A000019 A081177 this_sequence A101085 A088880 
               A008818
%Y A007281 Adjacent sequences: A007278 A007279 A007280 this_sequence A007282 A007283 
               A007284
%K A007281 nonn,hard
%O A007281 1,3
%A A007281 Hong-Yeop Song (hy.song(AT)coding.yonsei.ac.kr)

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