Triangle read by rows: row n (n >= 1) contains the numbers T(n,k) = Sum_{d|n} phi(d)*k^(n/d)/n, for k=1..n.
A054631
Triangle read by rows: row n (n >= 1) contains the numbers T(n,k) = Sum_{d|n} phi(d)*k^(n/d)/n, for k=1..n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =4a(5) =11a(6) =1a(7) =6a(8) =24a(9) =70a(10) =1a(11) =8a(12) =51a(13) =208a(14) =629a(15) =1a(16) =14a(17) =130a(18) =700a(19) =2635a(20) =7826a(21) =1a(22) =20a(23) =315a(24) =2344a(25) =11165a(26) =39996a(27) =117655a(28) =1a(29) =36
External references
- oeis: A054631