122584

Appears in sequences

• T(2n-1,n), array T as in A054144.at n=7A054149
• Number of 4-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=19A187289
• Numbers x such that sigma(x) + sigma(R(x)) = sigma(x + R(x)), where R(x) is the digit reversal of x and sigma(x) is the sum of the divisors of x.at n=37A246487
• Number of length n+4 0..3 arrays with at most one downstep in every n consecutive neighbor pairs.at n=8A258734
• Triangle read by rows: T(n,k) = 2*n+1 for k = 0 and otherwise T(n,k) = Sum_{i=n-k..n, j=0..i-n+k, i<>n or j<>k} T(i,j).at n=53A335436