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).

A357289

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) =1a(4) =5a(5) =16a(6) =38a(7) =83a(8) =167a(9) =314a(10) =572a(11) =1021a(12) =1757a(13) =3004a(14) =5082a(15) =8439a(16) =13971a(17) =23086a(18) =37576a(19) =61281a(20) =99833a(21) =160912a(22) =259878a(23) =420283a(24) =672847a(25) =1081058a(26) =1739124a(27) =2774021a(28) =4439701a(29) =7121188

External references