573048

Appears in sequences

• Triangle read by rows: T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} that have exactly k nonrecurrent elements mapped to some (one or more) recurrent element. n >= 1, 0 <= k <= n-1.at n=42A216971
• Number of length 1+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=26A247727
• Numbers such that the two adjacent integers are a prime and the square of another prime.at n=46A347194
• Numbers k such that k, k+1 and k+2 are all in A362401.at n=21A362405