368588

Appears in sequences

• Number of arrangements of n+2 nonzero numbers x(i) in -4..4 with the sum of x(i)*x(i+1) equal to zero.at n=5A188244
• T(n,k)=Number of arrangements of n+2 nonzero numbers x(i) in -k..k with the sum of x(i)*x(i+1) equal to zero.at n=41A188249
• Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=3A188254
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,4,2,2,1,0,2 for x=0,1,2,3,4,5,6.at n=6A197935
• a(n) is the position of A051451(n) in A025487.at n=27A346407