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 A114883 #12 Nov 19 2021 15:49:22 %S A114883 1,2,4,3,12,7,5,24,17,10,6,60,38,27,13,8,84,71,45,32,16,9,144,110,93, %T A114883 59,42,19,11,180,161,123,104,66,47,22,14,264,218,195,149,126,80,57,28 %N A114883 Obtained from A114882 by deleting row 1 and dividing by 2. %C A114883 A permutation of the natural numbers. Row 1 consists of those congruent to 1 mod 3. (One can then delete row 1 of A114883, leaving only numbers congruent to 0 or 2 mod 3 and then replace each by its rank, thus obtaining another permutation of the natural numbers.) %C A114883 Also numbers from the array A083140, without the first row, minus 1 divided by 2. %e A114883 Start with the northwest corner of A114881: %e A114883 1 3 5 7 9 %e A114883 2 8 14 20 26 %e A114883 4 24 34 54 64 %e A114883 6 48 76 90 118 %e A114883 Delete row 1, leaving all the even positive integers; divide them by 2: %e A114883 1 4 7 10 13 %e A114883 2 12 17 27 32 %e A114883 3 24 38 45 59 %Y A114883 Cf. A083140, A114881. %K A114883 nonn,tabl %O A114883 1,2 %A A114883 _Clark Kimberling_, Jan 03 2006