115344
domain: N
Appears in sequences
- Triangle T(n,k) of number of unilaterally connected digraphs on n unlabeled nodes with k arcs, k=0..n*(n-1).at n=57A057270
- Numbers k such that the concatenation of k with 4*k gives a square.at n=19A115535
- Numbers with 50 divisors.at n=27A175756
- Numbers with prime factorization pq^4r^4.at n=26A190012
- Somos's sequence {a(4,n)} defined in comment in A018896.at n=27A271341
- Numbers k such that s(k) = s(k+1), where s(k) is A059975.at n=37A327250