A322426 Array read by downwards antidiagonals: A(n, k) is the k-th term of a "Look to the left" sequence starting with 1,2,...,n (see A293630).

1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 1, 1, 3, 2, 1, 2, 2, 4, 3, 2, 1, 1, 1, 1, 4, 3, 2, 1, 1, 2, 2, 5, 4, 3, 2, 1, 2, 1, 3, 1, 5, 4, 3, 2, 1, 1, 2, 1, 2, 6, 5, 4, 3, 2, 1, 1, 1, 2, 3, 1, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 2, 7, 6, 5, 4, 3, 2, 1, 2, 3, 1, 1, 3, 1, 7, 6, 5

Offset: 2

Author

Iain Fox, Dec 07 2018

Keywords

• nonn
• tabl
• look

Examples

			| n\k |  1   2   3   4   5   6   7   8   9  10  11  12  13  ...
|-----|-----------------------------------------------------------
|  2  |  1,  2,  1,  1,  1,  2,  1,  1,  2,  1,  1,  1,  2, ...
|  3  |  1,  2,  3,  1,  2,  1,  2,  1,  2,  1,  2,  3,  1, ...
|  4  |  1,  2,  3,  4,  1,  2,  3,  1,  2,  3,  1,  2,  3, ...
|  5  |  1,  2,  3,  4,  5,  1,  2,  3,  4,  1,  2,  3,  4, ...
|  6  |  1,  2,  3,  4,  5,  6,  1,  2,  3,  4,  5,  1,  2, ...
|  7  |  1,  2,  3,  4,  5,  6,  7,  1,  2,  3,  4,  5,  6, ...
|  8  |  1,  2,  3,  4,  5,  6,  7,  8,  1,  2,  3,  4,  5, ...
| ... |
		

Links

• Iain Fox, Antidiagonals n = 1..141 of array, flattened

Crossrefs

n-th row: A293630 (n=2), A322423 (n=3), A322424 (n=4), A322425 (n=5).

Programs

PARI

row(n, k) = my(v=vector(n, i, i), w); while(#v
				

Formula

If k <= n, A(n, k) = k.