A373791 a(n) = 0 if p = prime(n) is introduced in A373390 by 2*p, or 1 if p is introduced by 3*p.

1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1

Comments

It is conjectured (see A373790) that every prime p in A373390 is introduced by either 2*p or 3*p, and that exactly 11 primes (listed in A372078) are introduced by 3*p. This would imply that the present sequence is 0 after the 35th term.

Links

Table of n, a(n) for n=1..103.

Crossrefs

Cf. A373390, A372072, A372073, A372078-A372081, A373786-A373790.

Sequence in context: A188093 A190843 A287772 * A190198 A071004 A188083

Adjacent sequences: A373788 A373789 A373790 * A373792 A373793 A373794

Keyword

nonn

Author

N. J. A. Sloane, Jun 21 2024

Status

approved