Number of solutions to Sum_{i=1..n} x_i^2 == 1 (mod 4) with x_i in 0..3.
A229136
Number of solutions to Sum_{i=1..n} x_i^2 == 1 (mod 4) with x_i in 0..3.
Terms
- a(0) =2a(1) =8a(2) =24a(3) =64a(4) =192a(5) =768a(6) =3584a(7) =16384a(8) =69632a(9) =278528a(10) =1081344a(11) =4194304a(12) =16515072a(13) =66060288a(14) =266338304a(15) =1073741824a(16) =4311744512a(17) =17246978048a(18) =68853694464a(19) =274877906944
External references
- oeis: A229136