Number of representations of 1 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 + 1.
A236430
Number of representations of 1 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 + 1.
Terms
- a(0) =2a(1) =5a(2) =11a(3) =22a(4) =42a(5) =76a(6) =134a(7) =228a(8) =379a(9) =606a(10) =985a(11) =1528a(12) =2364a(13) =3576a(14) =5419a(15) =7988a(16) =11868a(17) =17163a(18) =24937a(19) =35599a(20) =50787a(21) =71290a(22) =100748a(23) =139734a(24) =194113
External references
- oeis: A236430