Number of subsets of {1,...,n + 1} containing n + 1 and such that all positive differences of distinct elements are distinct.
A308251
Number of subsets of {1,...,n + 1} containing n + 1 and such that all positive differences of distinct elements are distinct.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =14a(6) =21a(7) =34a(8) =49a(9) =76a(10) =101a(11) =146a(12) =205a(13) =294a(14) =397a(15) =560a(16) =747a(17) =1028a(18) =1341a(19) =1810a(20) =2343a(21) =3178a(22) =4051a(23) =5370a(24) =6921a(25) =9014a(26) =11361a(27) =14838a(28) =18719a(29) =24082
External references
- oeis: A308251