42282
domain: N
Appears in sequences
- Number of essentially different ways of arranging numbers 1 through 2n around a circle so that the sum of each pair of adjacent numbers is prime and the odd (or even) numbers are in order.at n=24A072616
- Number of ways to place 2 nonattacking nightriders on an n X n toroidal board.at n=17A196812
- Numbers n such that n!10-1 is prime.at n=38A204658
- Number of nX2 0..n+2-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=4A265452
- Number of nX5 0..n+5-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=1A265455
- T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=16A265458
- T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=19A265458
- Numbers k with the property that there exists a positive integer multiplier M such that M times the sum of the digits of k, multiplied further by the reversal of this product, gives k.at n=39A305131
- a(n) is the index of the first occurrence of n in A331284.at n=28A331285