OFFSET
0,4
COMMENTS
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..11475 (rows 0..150 of the triangle, flattened)
FORMULA
EXAMPLE
Triangle begins:
n\k| 0 1 2 3 4 5 6 7 8 9 ...
---+-------------------------------------------
0 | 0;
1 | 1, 1;
2 | 2, 1, 2;
3 | 3, 2, 2, 3;
4 | 4, 3, 4, 3, 4;
5 | 5, 4, 6, 6, 4, 5;
6 | 6, 5, 8, 9, 8, 5, 6;
7 | 7, 6, 10, 12, 12, 10, 6, 7;
8 | 8, 7, 12, 15, 16, 15, 12, 7, 8;
9 | 9, 8, 14, 18, 20, 20, 18, 14, 8, 9;
...
MATHEMATICA
With[{rowmax=10}, Table[If[0<k<n, k(n-k), n], {n, 0, rowmax}, {k, 0, n}]] (* Paolo Xausa, Nov 15 2023 *)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Paul Curtz, Mar 10 2021
EXTENSIONS
Name edited by Paolo Xausa, Nov 15 2023
STATUS
approved