194633

Appears in sequences

• Number of positive integers <= 2^n of form x^2 + 16*y^2.at n=21A000018
• A symmetrical triangle sequence:q=3;c(n,q)=Product[1 - q^i, {i, 1, n}];t(n,m,q)=-Eulerian[n + 1, m] + 2*c(n, q)/(c(m, q)*c(n - m, q)).at n=30A176428
• A symmetrical triangle sequence:q=3;c(n,q)=Product[1 - q^i, {i, 1, n}];t(n,m,q)=-Eulerian[n + 1, m] + 2*c(n, q)/(c(m, q)*c(n - m, q)).at n=33A176428
• Number of zero-sum n X 2 -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=4A201955
• T(n,k)=Number of zero-sum nXk -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=16A201958
• T(n,k)=Number of zero-sum nXk -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=19A201958