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

0,3

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 ...

...

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.

Example

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

Crossrefs

Cf. A064641, A232972.

Sequence in context: A217105 A143892 A129321 * A193630 A144505 A369527

Adjacent sequences: A064639 A064640 A064641 * A064643 A064644 A064645

Keyword

nonn,tabl

Author

Floor van Lamoen, Oct 03 2001

Status

approved