Square array A(n,k), n>=1, k>=1, read by antidiagonals, with A(1,k)=1 and sequence a_k of column k shifts left when Dirichlet convolution with a_k (DC:(b,a_k)->a) applied k times.
A144823
Square array A(n,k), n>=1, k>=1, read by antidiagonals, with A(1,k)=1 and sequence a_k of column k shifts left when Dirichlet convolution with a_k (DC:(b,a_k)->a) applied k times.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =3a(9) =4a(10) =1a(11) =1a(12) =4a(13) =9a(14) =9a(15) =1a(16) =1a(17) =5a(18) =16a(19) =30a(20) =18a(21) =1a(22) =1a(23) =6a(24) =25a(25) =70a(26) =90a(27) =40a(28) =1a(29) =1
External references
- oeis: A144823