A064577 First differences of A064574.

0, 0, 1, 0, 1, 0, 2, 1, 1, 0, 3, 0, 1, 1, 4, 0, 3, 0, 4, 1, 1, 0, 6, 1, 1, 2, 4, 0, 4, 0, 6, 1, 1, 1, 9, 0, 1, 1, 7, 0, 5, 0, 5, 3, 1, 0, 11, 1, 3, 1, 6, 0, 6, 1, 8, 1, 1, 0, 12, 0, 1, 3, 11, 1, 5, 0, 8, 1, 4, 0, 17, 0, 1, 3, 8, 1, 6, 0, 15, 4, 1, 0, 17, 1, 1, 1, 13, 0, 11, 1, 10, 1, 1, 1, 21, 0, 3, 4, 16

Offset

1,7

Comments

Apparently a(n)=0 when n+1 is prime. Diverges from A028422(n+1) at n=19.

Links

Antti Karttunen, Table of n, a(n) for n = 1..16383

Formula

a(n) = A064574(n+1) - A064574(n). - Antti Karttunen, Feb 24 2020

Crossrefs

Cf. A064572, A064573, A064574, A064575, A064576, A028422.

Sequence in context: A055212 A360661 A028422 * A371729 A322435 A113949

Adjacent sequences: A064574 A064575 A064576 * A064578 A064579 A064580

Keyword

easy,nonn,look

Author

Marc LeBrun, Sep 20 2001

Status

approved