a(n) = Sum_{k=1..n} k*C(n,k), where C(n,k) = number of binary sequences of length n and curling number k (A216955).
A217941
a(n) = Sum_{k=1..n} k*C(n,k), where C(n,k) = number of binary sequences of length n and curling number k (A216955).
Terms
- a(0) =2a(1) =6a(2) =14a(3) =32a(4) =66a(5) =140a(6) =282a(7) =574a(8) =1156a(9) =2326a(10) =4654a(11) =9348a(12) =18698a(13) =37436a(14) =74904a(15) =149896a(16) =299794a(17) =599780a(18) =1199562a(19) =2399448a(20) =4798996a(21) =9598556a(22) =19197114a(23) =38395584a(24) =76791200a(25) =153584626a(26) =307169622a(27) =614343808a(28) =1228687618a(29) =2457384892
External references
- oeis: A217941