Number of -n..n arrays x(0..3) of 4 elements with zero sum and no element more than one greater than the previous.
A199848
Number of -n..n arrays x(0..3) of 4 elements with zero sum and no element more than one greater than the previous.
Terms
- a(0) =11a(1) =23a(2) =42a(3) =68a(4) =103a(5) =149a(6) =206a(7) =276a(8) =361a(9) =461a(10) =578a(11) =714a(12) =869a(13) =1045a(14) =1244a(15) =1466a(16) =1713a(17) =1987a(18) =2288a(19) =2618a(20) =2979a(21) =3371a(22) =3796a(23) =4256a(24) =4751a(25) =5283a(26) =5854a(27) =6464a(28) =7115a(29) =7809
External references
- oeis: A199848