Number of 1..n integer arrays v[1..4] of length 4 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..3.
A171341
Number of 1..n integer arrays v[1..4] of length 4 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..3.
Terms
- a(0) =1a(1) =15a(2) =74a(3) =240a(4) =597a(5) =1235a(6) =2318a(7) =3978a(8) =6399a(9) =9781a(10) =14388a(11) =20364a(12) =28141a(13) =37907a(14) =49986a(15) =64790a(16) =82711a(17) =103983a(18) =129254a(19) =158720a(20) =193017a(21) =232639a(22) =278134a(23) =329748a(24) =388427a(25) =454593a(26) =528832a(27) =611758a(28) =704263a(29) =806483
External references
- oeis: A171341