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 A134811 #22 Apr 11 2025 10:44:50
%S A134811 2,3,5,7,787,34543,345676543,34567876543
%N A134811 Giza primes.
%C A134811 Giza numbers (A134810) that are prime numbers. For n > 4 the structure of digits represents a pyramid at Giza. Also the top of a mountain. This sequence has only these 8 terms in base 10. For more information, see A134810.
%D A134811 Chris K. Caldwell and G. L. Honaker, Jr; Prime Curios!, The Dictionary of Prime Number Trivia, CreateSpace (2009), p. 209.
%H A134811 G. L. Honaker, Jr. and Chris K. Caldwell, <a href="https://t5k.org/curios/page.php?number_id=6663">Prime Curios! 34567876543</a>
%F A134811 A000040 INTERSECT A134810. - _Omar E. Pol_, Mar 25 2011
%e A134811 Illustration using the final term of this sequence:
%e A134811 . . . . . . . . . . .
%e A134811 . . . . . 8 . . . . .
%e A134811 . . . . 7 . 7 . . . .
%e A134811 . . . 6 . . . 6 . . .
%e A134811 . . 5 . . . . . 5 . .
%e A134811 . 4 . . . . . . . 4 .
%e A134811 3 . . . . . . . . . 3
%e A134811 . . . . . . . . . . .
%e A134811 . . . . . . . . . . .
%e A134811 . . . . . . . . . . .
%t A134811 ups = Flatten[Table[Range[i, j - 1], {i, 1, 9}, {j, i + 1, 10}], 1];afull = Sort[ Map[ToExpression@StringJoin@Map[ToString, #[[;; -2]] ~Join~ Reverse[#]] &, ups]];Select[afull,PrimeQ] (* _James C. McMahon_, Apr 11 2025 *)
%Y A134811 Cf. A000040, A048398, A046479, A134810.
%K A134811 fini,full,nonn,base
%O A134811 1,1
%A A134811 _Omar E. Pol_, Nov 30 2007
%E A134811 Reference and link added by _Omar E. Pol_, Mar 25 2011