-253440

Appears in sequences

• Coefficients of powers of two Hadamard characteristic polynomials: M(n)=Hadamard[2^n] except for 12.at n=24A158234
• a(n) = A181089(2*n+1,n)/(n+2).at n=5A181088
• Triangle read by rows: T(0,0) = 1; T(n,k) = -2*T(n-1,k) + 3*T(n-2,k-1) for 0 <= k <= floor(n/2); T(n,k)=0 for n or k < 0.at n=51A302747
• Triangle read by rows: T(0,0) = 1; T(n,k) = -2 T(n-1,k) + 3 * T(n-3,k-1) for k = 0..floor(n/3); T(n,k)=0 for n or k < 0.at n=47A317503