Number of representations of 0 as a sum of numbers d*k with d in {-1,1} and k in {1,2,...,n}, where the sum of the numbers k is 2n.
A236429
Number of representations of 0 as a sum of numbers d*k with d in {-1,1} and k in {1,2,...,n}, where the sum of the numbers k is 2n.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =14a(4) =25a(5) =52a(6) =86a(7) =160a(8) =260a(9) =443a(10) =688a(11) =1146a(12) =1721a(13) =2716a(14) =4040a(15) =6176a(16) =8975a(17) =13482a(18) =19218a(19) =28167a(20) =39799a(21) =57081a(22) =79503a(23) =112987a(24) =155368
External references
- oeis: A236429