A291081 - OEIS

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A291081

Irregular triangle read by rows: T(n,m) = number of lattice paths of type A^H terminating at point (n, m).

1, 1, 7, 6, 3, 1, 51, 45, 30, 15, 5, 1, 393, 357, 266, 161, 77, 28, 7, 1, 3139, 2907, 2304, 1554, 882, 414, 156, 45, 9, 1, 25653, 24068, 19855, 14355, 9042, 4917, 2277, 880, 275, 66, 11, 1, 212941, 201643, 171106, 129844, 87802, 52624, 27742, 12727, 5005, 1651, 442, 91, 13, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..55.

Veronika Irvine, Lace Tessellations: A mathematical model for bobbin lace and an exhaustive combinatorial search for patterns, PhD Dissertation, University of Victoria, 2016.

EXAMPLE

Triangle begins:

1,1,

7,6,3,1,

51,45,30,15,5,1,

393,357,266,161,77,28,7,1,