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 A039965 An example of a d-perfect sequence. 1
 1, 2, 2, 1, 2, 0, 0, 0, 2, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 1, 2, 0, 0, 0, 2, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 1, 2, 0, 0, 0, 2, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS D. Kohel, S. Ling and C. Xing, Explicit Sequence Expansions, in Sequences and their Applications, C. Ding, T. Helleseth, and H. Niederreiter, eds., Proceedings of SETA'98 (Singapore, 1998), 308-317, 1999. FORMULA a(n) = ((-1)^(n+1)*A000108(n-1)) mod 3 - Christian G. Bower, Jun 12 2005 PROG (PARI) C(n) = binomial(2*n, n)/(n+1); a(n) = ((-1)^(n+1)*C(n-1)) % 3; \\ Michel Marcus, Jul 09 2016 CROSSREFS Cf. A000108. Sequence in context: A016739 A158452 A208929 * A300481 A074942 A043754 Adjacent sequences:  A039962 A039963 A039964 * A039966 A039967 A039968 KEYWORD nonn AUTHOR EXTENSIONS More terms from Christian G. Bower, Jun 12 2005 STATUS approved

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Last modified April 21 14:50 EDT 2021. Contains 343154 sequences. (Running on oeis4.)