52320
domain: N
Appears in sequences
- Numbers k such that sopfr(k) = sopfr(k - sopfr(k)).at n=34A050781
- Number of subgroups of the group GL(2,Z_n) of invertible 2 X 2 matrices mod n (sequence A000252).at n=18A066514
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (1, 0, 1), (1, 1, -1)}.at n=10A148846
- Number of (w,x,y,z) with all terms in {0,...,n} such that range{w,x,y,z} is not one of the numbers w,x,y,z.at n=16A212569
- Number of nX5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.at n=3A221385
- T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.at n=31A221388
- Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.at n=4A221390
- Numbers n such that sigma(sigma(n))/sigma(n) > sigma(sigma(m))/sigma(m) for all m < n.at n=27A289124
- a(n) = Sum_{d|n} d^(1 + 2*n/d).at n=13A294567
- a(n) = Sum_{d|n} mu(n/d) * binomial(d,4).at n=34A346761