OFFSET
1,3
EXAMPLE
The triangle begins at row n = 1 with columns 1 <= k <= n:
1;
0, 2;
0, 1, 1;
0, 1, 4, 1;
0, 1, 1, 4, 3;
0, 2, 2, 1, 6, 5;
MATHEMATICA
MapIndexed[PowerMod[2, #, Prime[Range[First[#2]]]] &, Join[{0, 1}, Select[Range[25], CompositeQ]]] (* Paolo Xausa, Jul 01 2024 *)
CROSSREFS
KEYWORD
AUTHOR
Juri-Stepan Gerasimov, Dec 10 2010
EXTENSIONS
A 23 replaced with 33 by R. J. Mathar, Dec 13 2010
STATUS
approved