Number of arrays of -6..6 integers x(1..n) with every x(i) in a subsequence of length 1, 2 or 3 with sum zero.
A193700
Number of arrays of -6..6 integers x(1..n) with every x(i) in a subsequence of length 1, 2 or 3 with sum zero.
Terms
- a(0) =1a(1) =13a(2) =139a(3) =703a(4) =5127a(5) =35121a(6) =231121a(7) =1571745a(8) =10581553a(9) =71181241a(10) =479947725a(11) =3232545773a(12) =21775125291a(13) =146700533417a(14) =988236372613
External references
- oeis: A193700