Number of arrays of -5..5 integers x(1..n) with every x(i) in a subsequence of length 1, 2 or 3 with sum zero.
A193699
Number of arrays of -5..5 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) =11a(2) =101a(3) =491a(4) =3141a(5) =19301a(6) =115761a(7) =706591a(8) =4292223a(9) =26065517a(10) =158426129a(11) =962553071a(12) =5848496923a(13) =35536745667a(14) =215924096065
External references
- oeis: A193699