250704

Appears in sequences

• Sums of 3 distinct powers of 12.at n=15A038493
• a(n)=12*sum(1<=i<=j<=k<=n,i*j/k).at n=27A088941
• a(n) = n^5 + n^3 + n^2.at n=12A133073
• Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.at n=6A255096
• Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.at n=2A255100
• T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.at n=38A255101
• a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} (-1)^(k/d + 1) * d ) /k.at n=7A356390