43838

Appears in sequences

• a(n) = Sum_{k=n+1..2*n} T(n,k), T given by A027052.at n=10A027077
• Partial sums of usigma(n)^2: square of the sum of unitary divisors of n.at n=39A074789
• a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.at n=14A143192
• Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=4A255784
• Number of (n+2) X (5+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=4A255789
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=40A255792