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 A340959 #17 Feb 01 2021 13:35:46
%S A340959 2,2,2,2,2,2,2,3,5,2,2,5,11,11,2,2,5,17,29,17,2,2,7,29,67,83,37,2,2,7,
%T A340959 37,127,257,251,67,2,2,11,53,223,631,1031,733,131,2,2,11,67,347,1297,
%U A340959 3137,4099,2203,257,2,2,11,83,521,2411,7789,15629,16411,6563
%N A340959 Table read by antidiagonals of the smallest prime >= n^k, n >= 1 and k >= 0.
%F A340959 T(n,k) = next_prime(n^k-1).
%e A340959 Table begins:
%e A340959 2, 2, 2, 2, 2, 2, ...
%e A340959 2, 2, 5, 11, 17, 37, ...
%e A340959 2, 3, 11, 29, 83, 251, ...
%e A340959 2, 5, 17, 67, 257, 1031, ...
%e A340959 2, 5, 29, 127, 631, 3137, ...
%e A340959 ...;
%e A340959 yielding the triangle:
%e A340959 2;
%e A340959 2, 2;
%e A340959 2, 2, 2;
%e A340959 2, 3, 5, 2;
%e A340959 2, 5, 11, 11, 2;
%e A340959 2, 5, 17, 29, 17, 2;
%e A340959 ...
%t A340959 T[n_,k_]:=NextPrime[n^k-1];Flatten[Table[T[n-k,k],{n,11},{k,0,n-1}]] (* _Stefano Spezia_, Feb 01 2021 *)
%o A340959 (PARI) T(n,k) = nextprime(n^k); \\ _Michel Marcus_, Feb 01 2021
%Y A340959 Cf. A104080 (n=2), A104081 (n=3), A104082 (n=4), A104083 (n=5), A104084 (n=7).
%K A340959 nonn,tabl
%O A340959 1,1
%A A340959 _Donald S. McDonald_, Jan 31 2021