Group the natural numbers with at least two members in each group such that the n-th group sum is a multiple of n: (1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11, 12, 13, 14, 15), (16, 17, 18, 19), (20, 21, 22, 23, 24, 25, 26, 27, 28), (29, 30, 31, 32, 33, 34), ... Sequence contains the group sums.
A088099
Group the natural numbers with at least two members in each group such that the n-th group sum is a multiple of n: (1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11, 12, 13, 14, 15), (16, 17, 18, 19), (20, 21, 22, 23, 24, 25, 26, 27, 28), (29, 30, 31, 32, 33, 34), ... Sequence contains the group sums.
Terms
- a(0) =3a(1) =12a(2) =21a(3) =84a(4) =70a(5) =216a(6) =189a(7) =440a(8) =396a(9) =280a(10) =242a(11) =192a(12) =858a(13) =1092a(14) =465a(15) =3568a(16) =2312a(17) =1188a(18) =2907a(19) =3420a(20) =1155a(21) =990a(22) =2691a(23) =1080a(24) =2925a(25) =1170a(26) =3159a(27) =1260a(28) =3393a(29) =1350
External references
- oeis: A088099