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 A068507 #35 Apr 16 2025 04:52:56 %S A068507 4,6,12,60,180,240,7560,55440,110880,73329656400,18632716502400, %T A068507 130429015516800,48519593772249600,149602080797769600, %U A068507 74377068101903920953600,927967188666725711881005276648000,241271469053348685089061371928480000 %N A068507 Highly composite numbers sandwiched between twin primes. %C A068507 Intersection of (A072826 - 1) and (A072828 + 1). - _Lekraj Beedassy_, Nov 27 2003 %C A068507 The next term, a(18), is A002182(1002), it has 77 digits. - _M. F. Hasler_, Jun 23 2019 %C A068507 a(22) > 10^17030, if it exists. - _Amiram Eldar_, Dec 03 2020 %H A068507 M. F. Hasler and Amiram Eldar, <a href="/A068507/b068507.txt">Table of n, a(n) for n = 1..21</a> (terms 1..20 from M. F. Hasler) %H A068507 Brian Hayes, <a href="http://bit-player.org/2021/does-having-prime-neighbors-make-you-more-composite">Does having prime neighbors make you more composite?</a>, Bit-Player Article, Nov 04 2021 %F A068507 a(n) = A002182(A321995(n)). - _Amiram Eldar_, Dec 03 2020 %e A068507 60 is between 59 and 61. %Y A068507 Cf. A002182, A072826, A072828, A117825, A321995. %Y A068507 This is also the intersection of A002182 and A014574. %K A068507 nonn %O A068507 1,1 %A A068507 _Lekraj Beedassy_, Mar 25 2002 %E A068507 Corrected and extended by _Lior Manor_, Jun 03 2002 %E A068507 More terms from _Bill McEachen_, May 24 2006 %E A068507 a(18)-a(20) from _M. F. Hasler_, Jun 23 2019