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 A167692 #12 Nov 10 2024 16:08:26 %S A167692 0,8,10,14,16,20,22,24,26,28,32,34,36,38,40,44,46,48,50,52,54,56,58, %T A167692 62,64,66,68,70,74,76,78,80,82,84,86,88,90,92,94,96,98,100,104,106, %U A167692 110,112,114,116,118,120,122,124,126,128,130,132,134,136,140,142,144,146,148 %N A167692 The even nonisolated nonprimes. %C A167692 Zero together with A100319, the even numbers n such that at least one of n-1 and n+1 is composite. %H A167692 G. C. Greubel, <a href="/A167692/b167692.txt">Table of n, a(n) for n = 1..1000</a> %t A167692 Select[Range[0, 100], Mod[#, 2] == 0 && !PrimeQ[#] && (! PrimeQ[# - 1] || !PrimeQ[# + 1]) &] (* _G. C. Greubel_, Jul 07 2016 *) %t A167692 Join[{0},Select[Range[2,150,2],AnyTrue[#+{1,-1},CompositeQ]&]] (* _Harvey P. Dale_, Nov 10 2024 *) %o A167692 (PARI) isA167692(n) = (n%2==0)&&!isprime(n)&&(!isprime(n-1)||!isprime(n+1)) \\ _Michael B. Porter_, Feb 02 2010 %Y A167692 Cf. A100319, A164276. %K A167692 nonn,easy,less %O A167692 1,2 %A A167692 _Juri-Stepan Gerasimov_, Nov 09 2009 %E A167692 Edited by _Charles R Greathouse IV_, Mar 22 2010