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A174699
Triangle read by rows: T(n,k) = 2^(2n) mod (2k+1).
1
0, 0, 1, 0, 1, 1, 0, 1, 4, 1, 0, 1, 1, 4, 4, 0, 1, 4, 2, 7, 1, 0, 1, 1, 1, 1, 4, 1, 0, 1, 4, 4, 4, 5, 4, 4, 0, 1, 1, 2, 7, 9, 3, 1, 1, 0, 1, 4, 1, 1, 3, 12, 4, 4, 1, 0, 1, 1, 4, 4, 1, 9, 1, 16, 4, 4
OFFSET
0,9
EXAMPLE
The triangle starts at row n = 0 with columns 0 <= k <= n:
0;
0, 1;
0, 1, 1;
0, 1, 4, 1;
0, 1, 1, 4, 4;
0, 1, 4, 2, 7, 1;
0, 1, 1, 1, 1, 4, 1;
0, 1, 4, 4, 4, 5, 4, 4;
MATHEMATICA
Array[PowerMod[2, 2*#, Range[1, 2*#+1, 2]] &, 15, 0] (* Paolo Xausa, Jun 29 2024 *)
CROSSREFS
Sequence in context: A334429 A295281 A256461 * A213027 A347618 A290459
KEYWORD
nonn,tabl,easy
AUTHOR
STATUS
approved