OFFSET
1,3
LINKS
Seiichi Manyama, Antidiagonals n = 1..9, flattened
FORMULA
L.g.f. of column k: -log(Product_{j>=1} (1 - j^(j^k) * x^j)^(1/j)).
EXAMPLE
Square array begins:
1, 1, 1, 1, ...
3, 5, 17, 257, ...
4, 28, 19684, 7625597484988, ...
9, 273, 4294967553, 340282366920938463463374607431768276993, ...
MATHEMATICA
T[n_, k_] := DivisorSum[n, #^(n * #^(k-1)) &]; Table[T[k, n - k], {n, 1, 7}, {k, 1, n}] // Flatten (* Amiram Eldar, May 09 2021 *)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Jun 16 2019
STATUS
approved