61060

Appears in sequences

• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n that have k valleys at level 1.at n=58A114489
• Number of cusps in a class of degree-3n complex algebraic surfaces.at n=21A225018
• Consider a number n with m decimal digits. The sequence lists the numbers n having the prefix of length m-1 in the middle of the decimal expansion of prime(n).at n=30A242956
• Numbers n such that there is k < n for which A003557(k) = A003557(n), A048250(k) = A048250(n) and A173557(k) = A173557(n).at n=10A296087
• a(n) is the number of configurations of n indistinguishable pairs placed on the vertices of the ladder graph P_2 X P_n such that all but two such pairs are joined by an edge.at n=12A318267