Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=1..n} sigma_k(j) * floor(n/j).
A356045
Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=1..n} sigma_k(j) * floor(n/j).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =1a(4) =5a(5) =7a(6) =1a(7) =7a(8) =10a(9) =13a(10) =1a(11) =11a(12) =18a(13) =21a(14) =16a(15) =1a(16) =19a(17) =40a(18) =45a(19) =28a(20) =25a(21) =1a(22) =35a(23) =102a(24) =123a(25) =72a(26) =48a(27) =28a(28) =1a(29) =67
External references
- oeis: A356045