Number of 1..4 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.
A171278
Number of 1..4 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) =4a(1) =16a(2) =62a(3) =240a(4) =914a(5) =3508a(6) =13297a(7) =50461a(8) =191050a(9) =722932a(10) =2726415a(11) =10295319a(12) =38671908a(13) =146751022a(14) =550500089a(15) =2073212701a(16) =7808201806a(17) =29400052201a(18) =110000818929
External references
- oeis: A171278