Clark's triangle is a number triangle created by setting the vertex equal to 0, filling one diagonal with 1s, the other diagonal
with multiples of an integer , and filling in the remaining entries by summing the elements
on either side from one row above. The illustration above shows Clark's triangle
for
(OEIS A090850).

Clark, J. E. "Clark's Triangle." Math. Student26, No. 2, p. 4, Nov. 1978.Sloane,
N. J. A. Sequence A090850 in "The
On-Line Encyclopedia of Integer Sequences."