T(n, k) = (1/n) * Sum_{d|n} phi(d) * A241171(n/d, k) for n >= 1, T(0, k) = 0^k. Triangle read by rows for 0 <= k <= n.
A327027
T(n, k) = (1/n) * Sum_{d|n} phi(d) * A241171(n/d, k) for n >= 1, T(0, k) = 0^k. Triangle read by rows for 0 <= k <= n.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =3a(6) =0a(7) =1a(8) =10a(9) =30a(10) =0a(11) =1a(12) =33a(13) =315a(14) =630a(15) =0a(16) =1a(17) =102a(18) =2646a(19) =15120a(20) =22680a(21) =0a(22) =1a(23) =348a(24) =21135a(25) =263340a(26) =1039500a(27) =1247400a(28) =0a(29) =1
External references
- oeis: A327027