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 A167853 #16 Mar 19 2013 18:04:49 %S A167853 2,3,5,7,131,151,163,173,181,191,193,197,241,251,263,271,281,283,293, %T A167853 353,373,383,397,461,463,487,491,563,571,587,593,673,683,691,787,797, %U A167853 1231,1283,1291,1297,1321,1361,1373,1381,1451,1453,1471 %N A167853 Generalized mountain primes. %C A167853 Primes in A134853. This sequence is finite because A134853 is. %C A167853 Superset of A134951, mountain primes. %C A167853 Question: How many terms are in this sequence? %C A167853 The last term is a(7145) = 134567897654321. - _Giovanni Resta_, Mar 19 2013 %H A167853 Giovanni Resta, <a href="/A167853/b167853.txt">Table of n, a(n) for n = 1..7145</a> (full sequence) %e A167853 Illustration of 136973 as a generalized mountain prime: %e A167853 . . . 9 . . %e A167853 . . . . . . %e A167853 . . . . 7 . %e A167853 . . 6 . . . %e A167853 . . . . . . %e A167853 . . . . . . %e A167853 . 3 . . . 3 %e A167853 . . . . . . %e A167853 1 . . . . . %Y A167853 Cf. A000040, A134853, A134941, A134951, A135642, A167845. %K A167853 base,fini,full,nonn %O A167853 1,1 %A A167853 _Omar E. Pol_, Nov 13 2009, Nov 15 2009 %E A167853 More terms provided. _Harvey P. Dale_, Aug 19 2010 %E A167853 a(37)-a(47) corrected by _Giovanni Resta_, Mar 19 2013