a(n-5) is the number of nonempty subsets of {1,2,...,n} such that the difference of successive elements is at least 5.
A330910
a(n-5) is the number of nonempty subsets of {1,2,...,n} such that the difference of successive elements is at least 5.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =6a(4) =10a(5) =15a(6) =22a(7) =32a(8) =46a(9) =65a(10) =90a(11) =123a(12) =167a(13) =226a(14) =305a(15) =410a(16) =549a(17) =733a(18) =977a(19) =1301a(20) =1731a(21) =2301a(22) =3056a(23) =4056a(24) =5381a(25) =7137a(26) =9464a(27) =12547a(28) =16631a(29) =22041
External references
- oeis: A330910