A064575 - OEIS

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A064575

First differences of A064572.

1, 1, 3, 1, 4, 1, 6, 3, 6, 1, 11, 1, 8, 4, 14, 1, 16, 1, 19, 5, 16, 1, 29, 3, 22, 7, 31, 1, 37, 1, 42, 7, 38, 4, 62, 1, 48, 9, 69, 1, 73, 1, 80, 14, 76, 1, 114, 3, 100, 11, 121, 1, 132, 5, 150, 14, 142, 1, 193, 1, 168, 20, 213, 5, 223, 1, 247, 17, 247, 1, 319, 1, 286, 25, 339, 4, 355

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

Apparently a(n)=1 when n+1 is prime.

LINKS

Table of n, a(n) for n=1..77.

CROSSREFS

A064572, A064573, A064574, A064576, A064577, A028422.

Sequence in context: A332678 A069264 A347459 * A180251 A094119 A210622

Adjacent sequences: A064572 A064573 A064574 * A064576 A064577 A064578

KEYWORD

easy,nonn

AUTHOR

Marc LeBrun, Sep 20 2001

STATUS

approved