login
A176072
Primes of the form 3^k + 2^k + k + 1.
1
7, 281, 1602529
OFFSET
1,1
COMMENTS
The next term is too large to include here.
281 = 3^5 + 2^5 + 5 + 1,..
The corresponding values of k are 1, 5, 13, 905, 5341, ... ; a(5) ~ 2.016...*10^2548. - Amiram Eldar, Jul 18 2019
LINKS
MATHEMATICA
Select[Array[3^#+2^#+#+1&, 2*6! ], PrimeQ[ # ]&]
CROSSREFS
Sequence in context: A062646 A009503 A209889 * A096548 A160072 A137435
KEYWORD
nonn,bref
AUTHOR
STATUS
approved