Integers of the form (1/m)*sum(i=1,m,binomial(2i,i)).

A066974

Integers of the form (1/m)*sum(i=1,m,binomial(2i,i)).

Terms

    a(0) =2a(1) =4a(2) =70a(3) =2197a(4) =86944a(5) =305045a(6) =184940110a(7) =480921672850

External references