A216147 2*n^n + 1.

3, 3, 9, 55, 513, 6251, 93313, 1647087, 33554433, 774840979, 20000000001, 570623341223, 17832200896513, 605750213184507, 22224013651116033, 875787780761718751, 36893488147419103233, 1654480523772673528355, 78692816150593075150849, 3956839311320627178247959

Offset

0,1

Links

Table of n, a(n) for n=0..19.

Crossrefs

See A216148 for primes in this sequence, A110932 for the corresponding indices.

Sequence in context: A190960 A257623 A257625 * A334774 A257627 A115564

Adjacent sequences: A216144 A216145 A216146 * A216148 A216149 A216150

Keyword

nonn

Author

M. F. Hasler, Sep 02 2012

Status

approved