Number of 1..3 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.
A171277
Number of 1..3 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.
Terms
- a(0) =3a(1) =9a(2) =26a(3) =74a(4) =211a(5) =600a(6) =1674a(7) =4715a(8) =13195a(9) =36879a(10) =101640a(11) =283834a(12) =780315a(13) =2174226a(14) =5966025a(15) =16503544a(16) =45368343a(17) =124910711a(18) =340562430a(19) =941140452a(20) =2565147930a(21) =7020803047a(22) =19209921738a(23) =52557083220
External references
- oeis: A171277