88596

Appears in sequences

• Triangle read by rows where the n-th row is the first row of M^n, with M the (n+1)-by-(n+1) matrix with (1,3,1,3,1,3,...) on its main diagonal and (3,1,3,1,3,1,...) on its superdiagonal.at n=48A124572
• a(1)=1. a(n) = Sum_{1<=k<n, gcd(k,n(n+1))=1} a(k).at n=48A125596
• a(n) = Sum_{k=0..n} binomial(n, floor(k/2))*2^(n-k).at n=12A127358
• Number of permutations of 1..n with displacements restricted to {-5,-4,-2,-1,0,3}.at n=15A189589
• Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.at n=2A206110
• Number of (n+1) X 4 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.at n=2A206113
• T(n,k) = number of (n+1) X (k+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.at n=12A206118