Array read by antidiagonals: T(n,k) is the number of sublattices of index n in generic k-dimensional lattice (n >= 1, k >= 1).
A160870
Array read by antidiagonals: T(n,k) is the number of sublattices of index n in generic k-dimensional lattice (n >= 1, k >= 1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =4a(8) =7a(9) =1a(10) =1a(11) =7a(12) =13a(13) =15a(14) =1a(15) =1a(16) =6a(17) =35a(18) =40a(19) =31a(20) =1a(21) =1a(22) =12a(23) =31a(24) =155a(25) =121a(26) =63a(27) =1a(28) =1a(29) =8
External references
- oeis: A160870