a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least three elements of S) = max(S).
A357287
a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least three elements of S) = max(S).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =4a(7) =8a(8) =20a(9) =48a(10) =92a(11) =168a(12) =340a(13) =576a(14) =1004a(15) =1816a(16) =3012a(17) =4976a(18) =8732a(19) =14024a(20) =22900a(21) =38944a(22) =62156a(23) =99704a(24) =167972a(25) =264912a(26) =423292a(27) =704552a(28) =1108692a(29) =1758592
External references
- oeis: A357287