A064642 Triangle defined in A064641 read by rows.

1, 1, 2, 1, 5, 7, 1, 8, 22, 29, 1, 11, 46, 104, 133, 1, 14, 79, 251, 517, 650, 1, 17, 121, 497, 1369, 2669, 3319, 1, 20, 172, 869, 2986, 7541, 14179, 17498, 1, 23, 232, 1394, 5746, 17642, 42031, 77027, 94525, 1, 26, 301, 2099, 10108, 36482, 103696, 236933

Offset: 0

Author

Floor van Lamoen, Oct 03 2001

Keywords

• nonn
• tabl

Comments

Or, Dziemianczuk's array P(i,j) read by antidiagonals:

1 2 7 29 133 650 3319 17498 ...

1 5 22 104 517 2669 14179 77027 ...

1 8 46 251 1369 7541 42031 236933 ...

1 11 79 497 2986 17642 103696 609428 ...

1 14 121 869 5746 36482 226768 1393637 ...

...

Examples

			Triangle begins
  1;
  1, 2;
  1, 5,  7;
  1, 8, 22, 29;
  ...
		

Links

• Peter Kagey, Table of n, a(n) for n = 0..10010 (first 141 rows, flattened)
• M. Dziemianczuk, Counting Lattice Paths With Four Types of Steps, Graphs and Combinatorics, September 2013, Volume 30, Issue 6, pp 1427-1452.

Crossrefs

Cf. A064641, A232972.