Number of zero-sum -5..5 arrays of n elements with first and second differences also in -5..5.
A201870
Number of zero-sum -5..5 arrays of n elements with first and second differences also in -5..5.
Terms
- a(0) =1a(1) =5a(2) =27a(3) =173a(4) =977a(5) =5963a(6) =36569a(7) =229949a(8) =1451137a(9) =9210249a(10) =58617915a(11) =374278491a(12) =2396497371a(13) =15387074629a(14) =99039136267a(15) =638882616201
External references
- oeis: A201870