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

Author

Marc LeBrun, Sep 20 2001

Keywords

• easy
• nonn
• look

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

Crossrefs

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

Formula

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