a(n) is the smallest positive integer y such that there exists an integer x such that binomial(x + i*y, n) is a Gaussian integer.
A387569
a(n) is the smallest positive integer y such that there exists an integer x such that binomial(x + i*y, n) is a Gaussian integer.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =12a(4) =6a(5) =6a(6) =42a(7) =168a(8) =252a(9) =84a(10) =924a(11) =2772a(12) =924a(13) =924a(14) =2772a(15) =3696a(16) =924a(17) =5544a(18) =52668a(19) =105336a(20) =52668a(21) =105336a(22) =1211364
External references
- oeis: A387569