OFFSET
1,5
LINKS
Seiichi Manyama, Antidiagonals n = 1..100, flattened
EXAMPLE
Square array begins:
1, 1, 1, 1, 1, 1, 1, 1, ...
1, 2, 1, 0, 1, 0, 1, 2, ...
1, 2, 0, 1, 2, 0, 1, 2, ...
1, 3, 1, 1, 1, 1, 1, 3, ...
1, 2, 0, 0, 2, 1, 2, 0, ...
1, 4, 0, 0, 2, 0, 1, 4, ...
1, 2, 2, 0, 2, 0, 0, 1, ...
1, 4, 1, 0, 1, 0, 1, 4, ...
MATHEMATICA
A[n_, k_] := Sum[KroneckerSymbol[k, d], {d, Divisors[n]}];
Table[A[n - k, k], {n, 1, 13}, {k, n - 1, 0, -1}] // Flatten (* Jean-François Alcover, Sep 25 2019 *)
CROSSREFS
Columns k=0..31 give A000012, A000005, A035185, A035186, A001227, A035187, A035188, A035189, A035185, A035191, A035192, A035193, A035194, A035195, A035196, A035197, A001227, A035199, A035200, A035201, A035202, A035203, A035204, A035205, A035188, A035207, A035208, A035186, A035210, A035211, A035212, A035213.
Cf. A215200.
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Sep 25 2019
STATUS
approved