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%I #3 Mar 31 2012 10:28:53
%S 191,1217,1559,1901,2243,2927,4637,6689,8741,9767,12161,12503,13187,
%T 14897,15581,15923,16607,17291,19001,20369,21737,22079,23447,23789,
%U 24473,25841,26183,27551,27893,30971,33023,35759,37811,38153,39521
%N Prime numbers p such that p - 1 is the fourth a-figurate number and nineteenth b-figurate number for some a and b.
%C 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 These primes are very rare. There are only 10 less than 10000 and only 85 less than 100000.
%Y Cf. A096676, A144326
%K easy,nonn
%O 1,1
%A _Reikku Kulon_, Sep 17 2008