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A177416
Triangle read by rows: T(n,k) = 2^A141468(n) mod prime(k).
1
1, 0, 2, 0, 1, 1, 0, 1, 4, 1, 0, 1, 1, 4, 3, 0, 2, 2, 1, 6, 5, 0, 1, 4, 2, 1, 10, 4, 0, 1, 1, 1, 4, 1, 16, 11, 0, 1, 4, 4, 5, 4, 13, 6, 8, 0, 2, 3, 1, 10, 8, 9, 12, 16, 27, 0, 1, 1, 2, 9, 3, 1, 5, 9, 25, 2, 0, 1, 4, 1, 3, 12, 4, 1, 13, 13, 8, 36, 0, 1, 1, 4, 1, 9, 16, 4, 6, 23, 1, 33, 1, 0, 2, 2, 1, 2, 5, 15, 8, 12, 17, 2, 29, 2, 42
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
nonn,tabl,easy
AUTHOR
EXTENSIONS
A 23 replaced with 33 by R. J. Mathar, Dec 13 2010
STATUS
approved