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 A355066 #5 Jun 19 2022 06:33:35 %S A355066 1,2,3,5,4,7,11,13,17,19,6,23,29,31,37,41,43,47,49,53,59,61,8,9,67,71, %T A355066 73,79,83,89,97,101,103,107,109,113,127,131,77,137,139,149,151,157, %U A355066 163,167,10,173,179,181,191,193,197,199,211,223,227,229,233,239 %N A355066 Inverse permutation to A355065. %C A355066 This sequence has similarities with the Two-Up sequence (A090252) as a(n) is coprime to the next n terms (and to the floor(n/2) previous terms). %C A355066 Prime numbers appear in their natural order. %H A355066 Rémy Sigrist, <a href="/A355066/a355066.gp.txt">PARI program</a> %H A355066 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A355066 A355065(77) = 39, so a(39) = 77. %o A355066 (PARI) See Links section. %Y A355066 Cf. A090252, A355065. %K A355066 nonn %O A355066 1,2 %A A355066 _Rémy Sigrist_, Jun 17 2022