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 A370728 #13 Mar 02 2024 08:00:32 %S A370728 2,1,4,3,6,9,11,5,10,14,15,18,22,31,43,7,8,17,23,16,35,36,48,24,37,54, %T A370728 61,66,70,76,92,12,13,27,28,26,29,39,52,40,51,73,75,83,97,133,181,30, %U A370728 41,63,64,42,74,85,96,65,86,105,144,126,145,190,207,19,20 %N A370728 Inverse permutation of A370727. %C A370728 Also, lexicographically earliest sequence of distinct positive integers such that for any n > 0, prime(a(n)) AND n = n (where prime(k) denotes the k-th prime number and AND denotes the bitwise AND operator). %H A370728 Rémy Sigrist, <a href="/A370728/b370728.txt">Table of n, a(n) for n = 1..10000</a> %H A370728 Rémy Sigrist, <a href="/A370728/a370728.gp.txt">PARI program</a> %H A370728 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A370728 A370727(42) = 52, hence a(52) = 42. %o A370728 (PARI) See Links section. %Y A370728 Cf. A370727. %K A370728 nonn,base %O A370728 1,1 %A A370728 _Rémy Sigrist_, Feb 28 2024