A299912 a(n) = a056240-type of n-th prime, or -1 if the a056240-type is not defined.

-1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset: 1

Author

N. J. A. Sloane, Mar 10 2018

Keywords

• sign

Comments

For the definition of the a056240-type of a prime, see A293652, which also gives the smallest prime of a056240-type k for k = 1, 2, 3, ....

Links

• Michel Marcus, Table of n, a(n) for n = 1..5001
• Michel Marcus, PARI/GP program

Crossrefs

Cf. A056240, A293652.

For primes of a056240-types 2 and 3 see A300334 and A300359.

Programs

PARI

\\ See Marcus link.