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 A144327 #3 Mar 31 2012 10:28:53 %S A144327 191,1217,1559,1901,2243,2927,4637,6689,8741,9767,12161,12503,13187, %T A144327 14897,15581,15923,16607,17291,19001,20369,21737,22079,23447,23789, %U A144327 24473,25841,26183,27551,27893,30971,33023,35759,37811,38153,39521 %N A144327 Prime numbers p such that p - 1 is the fourth a-figurate number and nineteenth b-figurate number for some a and b. %C A144327 Sequence of primes sufficient to determine the conjecture of A144326. Presumed to include many terms that cannot be Mersenne prime exponents, noting A096676: either infinitely many, or all. %C A144327 These primes are very rare. There are only 10 less than 10000 and only 85 less than 100000. %Y A144327 Cf. A096676, A144326 %K A144327 easy,nonn %O A144327 1,1 %A A144327 _Reikku Kulon_, Sep 17 2008