a(n) is the number of subsets of {1,2,...,n} with at least two elements and the difference between successive elements at least 6.
A335184
a(n) is the number of subsets of {1,2,...,n} with at least two elements and the difference between successive elements at least 6.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =3a(9) =6a(10) =10a(11) =15a(12) =21a(13) =29a(14) =40a(15) =55a(16) =75a(17) =101a(18) =134a(19) =176a(20) =230a(21) =300a(22) =391a(23) =509a(24) =661a(25) =856a(26) =1106a(27) =1427a(28) =1840a(29) =2372
External references
- oeis: A335184