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 A130512 #7 Oct 19 2023 22:32:07 %S A130512 6,30,42,42,30,42,110,30,210,66,210,210,78,210,102,210,210,390,182, %T A130512 114,462,390,210,510,390,546,330,390,690,930,770,410,210,570,462,330, %U A130512 1122,1110,1518,1230,690,1190,570,1122,1122,834,2010,390,1794,1974,510,210 %N A130512 ABC conjecture: values of rad(a*b*c) in the list of "abc-hits". %H A130512 T. D. Noe, <a href="/A130512/b130512.txt">Table of n, a(n) for n=1..1269</a> %o A130512 (Python) %o A130512 from itertools import count, islice %o A130512 from math import prod, gcd %o A130512 from sympy import primefactors %o A130512 def A130512_gen(): # generator of terms %o A130512 for c in count(1): %o A130512 pc = set(primefactors(c)) %o A130512 for a in range(1,(c>>1)+1): %o A130512 b = c-a %o A130512 if gcd(a,b)==1 and c>(d:=prod(set(primefactors(a))|set(primefactors(b))|pc)): %o A130512 yield d %o A130512 A130512_list = list(islice(A130512_gen(),30)) # _Chai Wah Wu_, Oct 19 2023 %Y A130512 Cf. A130510. %K A130512 nonn %O A130512 1,1 %A A130512 _T. D. Noe_, Jun 01 2007