48046
domain: N
Appears in sequences
- Composite numbers k such that all the decimal concatenations ik and ikj (i, j = 1...9) are also composite.at n=25A032737
- Numbers k such that A001414(k) is a square and sets a new record for squares.at n=39A064463
- 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=5A143192
- Number of nX2 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=4A203544
- Number of nX5 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=1A203547
- T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=16A203550
- T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=19A203550
- Positions of record high water marks in A246024.at n=45A246026
- Number of irredundant sets in the n-cycle graph.at n=19A290493