OFFSET
1,1
COMMENTS
Row (i. e. antidiagonal) sums are: {102, 102, 74, 52, 22, 14}.
T(0, 0) * 2^5 = A328148(2) = 3264 answers the Steiner's problem: How many conics are simultaneously tangent to five fixed conics?
LINKS
Andrew Bashelor, Amy Ksir, and Will Traves, Enumerative Algebraic Geometry of Conics, The American Mathematical Monthly, vol. 115, no. 8, October 2008, pp. 701-728.
EXAMPLE
The complete triangle:
{{102},
{51, 51},
{23, 28, 23},
{12, 14, 14, 12},
{3, 4, 8, 4, 3},
{1, 2, 4, 4, 2, 1}}
Without dividing by 2^k, the triangle becomes:
{3264}
{816, 816}
{184, 224, 184}
{48, 56, 56, 48}
{6, 8, 16, 8, 6}
{1, 2, 4, 4, 2, 1}
CROSSREFS
KEYWORD
AUTHOR
Roger L. Bagula and Gary W. Adamson, Oct 09 2008
EXTENSIONS
Edited by Andrey Zabolotskiy, Jun 14 2022
STATUS
approved