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 A145061 #11 Jul 22 2025 06:12:35
%S A145061 0,2,2,5,5,8,5,14,2,14,5,14,5,2,14,5,14,5,14,17,35,5,14,29,23,14,8,11,
%T A145061 8,74,5,2,14,11,68,5,8,5,14,29,38,23,5,5,8,53,11,14,2,59,5,23,14,11,
%U A145061 32,41,2,26,8,23,14,26,2,11,8,5,47,14,20,14,20
%N A145061 Number of pairs of odd numbers that separate two consecutive twin prime pairs.
%C A145061 Example: a(3) = 2 because the third twin prime pair is (11, 13) and there are two pairs of odd numbers between (11, 13) and its immediate predecessor, (5,7), namely (7, 9) and (9, 11).
%F A145061 a(n) = (A001359(n+1) - (A001359(n) + 2))/2 = (A001359(n+1) - A006512(n))/2. - _Michel Marcus_, Sep 04 2013
%o A145061 (PARI) lista(nn) = {prm = primes(nn); gtp = select(p->isprime(p-2), prm); ltp = select(p->isprime(p+2), prm); for (i=1, #ltp-1, print1((ltp[i+1] - gtp[i])/2, ", "););} \\ _Michel Marcus_, Sep 04 2013
%K A145061 nonn
%O A145061 1,2
%A A145061 John Austin Curry (acurry(AT)mckoolsmith.com), Sep 30 2008
%E A145061 More terms from _Michel Marcus_, Sep 04 2013