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 A367634 #25 Apr 01 2025 21:26:01 %S A367634 1,2,2,3,1,1,4,3,3,1,5,4,2,2,1,6,5,4,4,2,1,7,6,5,5,5,2,1,8,7,6,3,3,3, %T A367634 2,1,9,8,7,6,6,6,3,2,1,10,9,8,7,7,7,7,3,2,1,11,10,9,8,4,4,4,4,3,2,1, %U A367634 12,11,10,9,8,8,8,8,4,3,2,1,13,12,11,10,9,5,5,5,5,4,3,2,1 %N A367634 Array read by descending antidiagonals, where row n=0 lists the natural numbers and where each new row n=1,2,... is found by taking the number n in the previous row, and "leaping" it over the next n terms to its right, keeping the other numbers fixed (see example). %e A367634 The array begins: %e A367634 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, ... %e A367634 2, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, ... %e A367634 1, 3, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, ... %e A367634 1, 2, 4, 5, 3, 6, 7, 8, 9, 10, 11, 12, 13, ... %e A367634 1, 2, 5, 3, 6, 7, 4, 8, 9, 10, 11, 12, 13, ... %e A367634 1, 2, 3, 6, 7, 4, 8, 5, 9, 10, 11, 12, 13, ... %e A367634 1, 2, 3, 7, 4, 8, 5, 9, 10, 6, 11, 12, 13, ... %e A367634 1, 2, 3, 4, 8, 5, 9, 10, 6, 11, 7, 12, 13, ... %e A367634 1, 2, 3, 4, 5, 9, 10, 6, 11, 7, 12, 13, 8, ... %e A367634 1, 2, 3, 4, 5, 10, 6, 11, 7, 12, 13, 8, 14, ... %e A367634 1, 2, 3, 4, 5, 6, 11, 7, 12, 13, 8, 14, 15, ... %e A367634 1, 2, 3, 4, 5, 6, 7, 12, 13, 8, 14, 15, 9, ... %e A367634 1, 2, 3, 4, 5, 6, 7, 13, 8, 14, 15, 9, 16, ... %e A367634 ... %Y A367634 Cf. A000027, A368050. %K A367634 nonn,tabl %O A367634 1,2 %A A367634 _Wesley Ivan Hurt_, Nov 25 2023