141128
domain: N
Appears in sequences
- Call (m,n) a "(-1)SSU amicable pair" if (-1)Sigma(m)*Sigma(m) = k*UnitaryPhi(m)*(m+n) and (-1)Sigma(n)*Sigma(n) = k*UnitaryPhi(n)*(m+n) for some integer k. Sequence gives values of m, assuming n <= m.at n=9A123728
- Concatenation of first 3 digits and last 3 digits of n-th perfect number.at n=13A138877
- Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 places and with no two consecutive increases.at n=10A263640