OFFSET
1,2
COMMENTS
Row sums are {1, 6, 8, 21, 12, 48, 16, 60, 39, 72}.
LINKS
G. C. Greubel, Rows n = 1..100 of triangle, flattened
FORMULA
T(n,m) = sigma_0(n) * A126988(n,m).
T(n,m) = sigma_0(n) * if(m = 1, n, if(n mod m = 0, n/m, 0)).
EXAMPLE
Triangle begins
{ 1},
{ 4, 2},
{ 6, 0, 2},
{12, 6, 0, 3},
{10, 0, 0, 0, 2},
{24, 12, 8, 0, 0, 4},
{14, 0, 0, 0, 0, 0, 2},
{32, 16, 0, 8, 0, 0, 0, 4},
{27, 0, 9, 0, 0, 0, 0, 0, 3},
{40, 20, 0, 0, 8, 0, 0, 0, 0, 4}
MATHEMATICA
t[n_, m_] = DivisorSigma[0, n]*If[m == 1, n, If[Mod[n, m] == 0, n/m, 0]]; Table[Table[t[n, m], {m, 1, n}], {n, 1, 10}]; Flatten[%]
CROSSREFS
KEYWORD
AUTHOR
Roger L. Bagula and Gary W. Adamson, Sep 06 2008
EXTENSIONS
Edited by the Associate Editors of the OEIS, Jun 10 2018
STATUS
approved