This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A177416 #22 Jul 01 2024 13:12:41
%S A177416 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,
%T A177416 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,
%U A177416 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
%N A177416 Triangle read by rows: T(n,k) = 2^A141468(n) mod prime(k).
%e A177416 The triangle begins at row n = 1 with columns 1 <= k <= n:
%e A177416 1;
%e A177416 0, 2;
%e A177416 0, 1, 1;
%e A177416 0, 1, 4, 1;
%e A177416 0, 1, 1, 4, 3;
%e A177416 0, 2, 2, 1, 6, 5;
%t A177416 MapIndexed[PowerMod[2, #, Prime[Range[First[#2]]]] &, Join[{0, 1}, Select[Range[25], CompositeQ]]] (* _Paolo Xausa_, Jul 01 2024 *)
%Y A177416 Cf. A000079, A141468, A174620.
%K A177416 nonn,tabl,easy
%O A177416 1,3
%A A177416 _Juri-Stepan Gerasimov_, Dec 10 2010
%E A177416 A 23 replaced with 33 by _R. J. Mathar_, Dec 13 2010