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A096904 A card-arranging problem: number of permutations p_1, ..., p_n of 1, ..., n such that i + p_i is a cube for every i. 1

%I

%S 0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,

%T 0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,1,0,1,

%U 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,1,0,4,0,0,4,4,5,1,2,1,1,1,1,2,3,7,3,10,6,5,1,1,4,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,3,30,37,1963,1289,1560

%N A card-arranging problem: number of permutations p_1, ..., p_n of 1, ..., n such that i + p_i is a cube for every i.

%F a(n) = permanent(m), where the n X n matrix m is defined by m(i,j) = 1 or 0, depending on whether i+j is a cube or not.

%Y Cf. A006063, A096680.

%K nonn

%O 1,112

%A _Ray Chandler_, Aug 01 2004

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Last modified February 23 12:03 EST 2019. Contains 320431 sequences. (Running on oeis4.)