Group the natural numbers such that the n-th group sum is divisible by prime(n): (1, 2, 3), (4, 5), (6, 7, 8, 9), (10, 11), (12, 13, 14, 15, 16, 17, 18, 19, 20, 21), ... Sequence contains the sum of the terms in the n-th group.
A086491
Group the natural numbers such that the n-th group sum is divisible by prime(n): (1, 2, 3), (4, 5), (6, 7, 8, 9), (10, 11), (12, 13, 14, 15, 16, 17, 18, 19, 20, 21), ... Sequence contains the sum of the terms in the n-th group.
Terms
- a(0) =6a(1) =9a(2) =30a(3) =21a(4) =165a(5) =234a(6) =238a(7) =38a(8) =690a(9) =522a(10) =2325a(11) =4107a(12) =4018a(13) =4988a(14) =564a(15) =9540a(16) =708a(17) =3172a(18) =9380a(19) =21726a(20) =8395a(21) =14615a(22) =1245a(23) =25365a(24) =11155a(25) =8585a(26) =1545a(27) =19795a(28) =55154a(29) =44070
External references
- oeis: A086491