Number of arrays of -6..6 integers x(1..n) with every x(i) in a subsequence of length 1, 2, 3 or 4 with sum zero.
A193708
Number of arrays of -6..6 integers x(1..n) with every x(i) in a subsequence of length 1, 2, 3 or 4 with sum zero.
Terms
- a(0) =1a(1) =13a(2) =139a(3) =1787a(4) =11913a(5) =102895a(6) =883493a(7) =7534239a(8) =62963491a(9) =533335257a(10) =4512230169a(11) =38134861983a(12) =322180217835
External references
- oeis: A193708