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 A307151 #17 Mar 05 2020 10:56:20 %S A307151 5,10,15,20,1,30,35,40,45,2,55,60,65,70,3,80,85,90,95,4,105,110,115, %T A307151 120,125,130,135,140,145,6,155,160,165,170,7,180,185,190,195,8,205, %U A307151 210,215,220,9,230,235,240,245,250,255,260,265,270,11,280,285,290,295 %N A307151 Row 5 of array in A059897. %C A307151 Also column 5 of A059897. %C A307151 A self-inverse permutation of the positive integers with no fixed points that swaps pairs of integers whose ratio is 1:5. %H A307151 Alois P. Heinz, <a href="/A307151/b307151.txt">Table of n, a(n) for n = 1..10000</a> %H A307151 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A307151 a(n) = A059897(5,n) = A059897(n,5). %p A307151 a:= n-> `if`(padic[ordp](n, 5)::odd, n/5, n*5): %p A307151 seq(a(n), n=1..60); %Y A307151 Cf. A059897. %Y A307151 Has same start as A283442 but that sequence is different (it has repeated terms). %K A307151 nonn %O A307151 1,1 %A A307151 _Peter Munn_ and _N. J. A. Sloane_, Mar 29 2019 %E A307151 More terms from _Alois P. Heinz_, Mar 31 2019