Numbers k such that the sum of the first k Catalan numbers, C_1 + C_2 + ... + C_k, is divisible by k.
A133927
Numbers k such that the sum of the first k Catalan numbers, C_1 + C_2 + ... + C_k, is divisible by k.
Terms
- a(0) =1a(1) =30a(2) =494a(3) =6331a(4) =36851a(5) =95450a(6) =122614a(7) =940745a(8) =5126032a(9) =7519204
External references
- oeis: A133927