45590

Appears in sequences

• Numbers k such that sigma(k + sigma(k)) = sigma((k+1) + sigma(k+1)).at n=8A246915
• Number of length-n 0..5 arrays with no adjacent pair x,x+1 repeated.at n=5A269653
• T(n,k) = number of length-n 0..k arrays with no adjacent pair x,x+1 repeated: infinite square array read by falling antidiagonals.at n=50A269656
• Number of length-6 0..n arrays with no adjacent pair x,x+1 repeated.at n=4A269659
• Partial sums of A033617.at n=45A299903