a(n) = where A284259 for the first time obtains value n (positions of its records).

A284262

a(n) = where A284259 for the first time obtains value n (positions of its records).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =105a(4) =5005a(5) =85085a(6) =1616615a(7) =37182145a(8) =6685349671a(9) =247357937827

External references