a(n) = least composite m such that binomial(3m,m) mod m = 3^n.
A109642
a(n) = least composite m such that binomial(3m,m) mod m = 3^n.
Terms
- a(0) =4a(1) =15a(2) =57a(3) =765a(4) =1025a(5) =2097a(6) =4947a(7) =9189a(8) =103599a(9) =216927a(10) =4346128a(11) =1558269a(12) =1977777a(13) =208510373a(14) =14493123a(15) =493262541a(16) =144228033
External references
- oeis: A109642