Number of 0..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.
A171309
Number of 0..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) =4a(1) =15a(2) =53a(3) =138a(4) =483a(5) =1678a(6) =5634a(7) =18915a(8) =62325a(9) =204315a(10) =683210a(11) =2277118a(12) =7559559a(13) =25132611a(14) =83206528a(15) =274465209a(16) =907716605a(17) =3004041236a(18) =9908081432
External references
- oeis: A171309