Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^2 equal to n^2*49.
A184238
Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^2 equal to n^2*49.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =30a(5) =47a(6) =706a(7) =2108a(8) =19178a(9) =97714a(10) =592976a(11) =4314051a(12) =20748316a(13) =146773816a(14) =682184037a(15) =4255325221a(16) =20091607500a(17) =109644051939a(18) =531805180789
External references
- oeis: A184238