48180

Appears in sequences

• Riordan array (1/(1-x*c(3*x)), x*c(3*x)/(1-x*c(3*x))), c(x) the g.f. of A000108.at n=50A110519
• Number of positive integer solutions to the Diophantine equation x + y + 2z = n^2.at n=20A218832
• Number of length n+4 0..4 arrays with no five consecutive terms having four times any element equal to the sum of the remaining four.at n=2A249462
• T(n,k)=Number of length n+4 0..k arrays with no five consecutive terms having four times any element equal to the sum of the remaining four.at n=17A249466
• Number of length 3+4 0..n arrays with no five consecutive terms having four times any element equal to the sum of the remaining four.at n=3A249469
• Number of maximum matchings in the n-triangular honeycomb queen graph.at n=4A289884
• a(n) = 5*(n+1)*(9*n+4).at n=32A304507
• Let p = A002145(n) be the n-th prime == 3 (mod 4); a(n) is the multiplicative order of 2+-i modulo p in Gaussian integers.at n=42A385165