Group the natural numbers such that the sum of the terms of every group has a distinct prime signature not occurring earlier: (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 of groups.
A086494
Group the natural numbers such that the sum of the terms of every group has a distinct prime signature not occurring earlier: (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 of groups.
Terms
- a(0) =1a(1) =2a(2) =12a(3) =6a(4) =24a(5) =60a(6) =48a(7) =78a(8) =120a(9) =27a(10) =252a(11) =36a(12) =324a(13) =336a(14) =504a(15) =448a(16) =648a(17) =729a(18) =1701a(19) =972a(20) =1800a(21) =128a(22) =390a(23) =1650a(24) =289a(25) =3276a(26) =4860a(27) =6930a(28) =3510a(29) =6084
External references
- oeis: A086494