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2,1

L. R. Varshney and V. K Goyal, Benefiting from Disorder: Source Coding for Unordered Data, preprint, 2007.

Table of n, a(n) for n=2..20.

Conjecture: a(n) = (15+(-1)^n-4*n+6*n^2)/8. a(n) = 2*a(n-1)-2*a(n-3)+a(n-4). G.f.: -x^2*(2*x^3-2*x^2-x+4) / ((x-1)^3*(x+1)). - Colin Barker, Sep 07 2013

Cf. A132298, A132299, A132300.

Sequence in context: A074148 A178907 A265431 * A007333 A097536 A293829

Adjacent sequences: A132294 A132295 A132296 * A132298 A132299 A132300

nonn

Lav R. Varshney (lrv(AT)mit.edu), Aug 17 2007

approved