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A144327
Prime numbers p such that p - 1 is the fourth a-figurate number and nineteenth b-figurate number for some a and b.
0
191, 1217, 1559, 1901, 2243, 2927, 4637, 6689, 8741, 9767, 12161, 12503, 13187, 14897, 15581, 15923, 16607, 17291, 19001, 20369, 21737, 22079, 23447, 23789, 24473, 25841, 26183, 27551, 27893, 30971, 33023, 35759, 37811, 38153, 39521
OFFSET
1,1
COMMENTS
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.
These primes are very rare. There are only 10 less than 10000 and only 85 less than 100000.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Reikku Kulon, Sep 17 2008
STATUS
approved