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 A304729 #6 May 19 2018 12:39:07
%S A304729 1,2,3,2,4,5,6,5,4,7,2,3,8,3,7,4,9,4,10,11,12,13,12,14,11,12,13,12,10,
%T A304729 15,16,5,4,7,4,9,6,17,6,9,18,2,3,8,3,7,4,9,4,7,19,3,8,20,8,19,7,18,7,
%U A304729 21,12,13,22,13,23,15,16,15,10,21,4,7,19,7,18,9,24,9,25,10,26,11,12,13,12,10,15,16,15,10,21,12,13,22,13,21,10,25,10,27,28
%N A304729 Restricted growth sequence transform of A046523(A303751(n)).
%H A304729 Antti Karttunen, <a href="/A304729/b304729.txt">Table of n, a(n) for n = 1..76503</a>
%o A304729 (PARI)
%o A304729 rgs_transform(invec) = { my(om = Map(), outvec = vector(length(invec)), u=1); for(i=1, length(invec), if(mapisdefined(om,invec[i]), my(pp = mapget(om, invec[i])); outvec[i] = outvec[pp] , mapput(om,invec[i],i); outvec[i] = u; u++ )); outvec; };
%o A304729 A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ From A046523
%o A304729 v304729 = rgs_transform(vector(76503,n,A046523(A303751(n)))); \\ Needs also code from A303751
%o A304729 A304729(n) = v304729[n];
%Y A304729 Cf. A046523, A303751.
%Y A304729 Cf. also A304728, A304098, A304732.
%K A304729 nonn
%O A304729 1,2
%A A304729 _Antti Karttunen_, May 19 2018