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 A036341 #15 May 14 2020 11:30:26 %S A036341 127787377,1510818931,3147482977,3307903909,3621408103,3964636549, %T A036341 7224979183,7881628361,8043354509,8740618759,10091655397,10164789521, %U A036341 10194261067,10380609119,10436432219,11472028801,12059694769,13887362681,14880879703,15197340049 %N A036341 Concatenation of prime p and nextprime(p) is prime -> cycles of 4 steps possible. %C A036341 a(1)-a(5) found by Jo Yeong Uk (hyukjo(AT)sigma.chungnam.ac.kr). %H A036341 Giovanni Resta, <a href="/A036341/b036341.txt">Table of n, a(n) for n = 1..4000</a> %H A036341 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_029.htm">Puzzle 29. P_i = P_(i-1) & nxtprm(P_(i-1)), P_i = prime for i => 1</a>, The Prime Puzzles and Problems Connection. %Y A036341 Cf. A030459, A034593, A036339, A036340. %K A036341 nonn,base %O A036341 1,1 %A A036341 _Patrick De Geest_, Dec 15 1998 %E A036341 Offset corrected and terms a(6) and beyond added by _Giovanni Resta_, May 14 2020