60484

Appears in sequences

• Numbers k such that j(k)*phi(k) = s(phi(k)), where j(k) = A033831(k), s(k) = sigma(k) - k.at n=13A033855
• Number of A095316-primes in range [2^n,2^(n+1)].at n=19A095326
• Number of A095320-primes in range ]2^n,2^(n+1)].at n=19A095330
• Number of nX3 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X4 binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.at n=6A227676
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.at n=38A227679
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.at n=42A227679
• a(n) is the number of time-dependent assembly trees satisfying the edge gluing rule for a cycle on n vertices.at n=7A317060