487936
domain: N
Appears in sequences
- a(n) = smallest number x such that sigma(x) = 2x + 2n.at n=35A087998
- a(n) = p*(p+(2n-1))/2, where p = A096822(n) is the smallest primes of form 2^x-(2n-1).at n=35A096823
- Number of (n+1)X(5+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=18A237634