A074737 - OEIS

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A074737

Let b(1)=b(2)=1, b(k+2)=gcd(k!,b(k+1)+b(k)); sequence gives values of n such that b(n)=1.

1, 1, 3, 6, 11, 14, 15, 24, 27, 36, 39, 41, 42, 51, 54, 56, 57, 66, 69, 74, 77, 87, 93, 96, 107, 114, 122, 126, 129, 131, 132, 143, 150, 162, 165, 189, 195, 200, 215, 227, 230, 234, 236, 237, 252, 258, 260, 261, 276, 282, 284, 285, 300, 306, 308, 309, 324, 330

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

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..58.

FORMULA

a(n) seems to be asymptotic to c*n*log(n) with 1<c<3/2

CROSSREFS

Sequence in context: A310091 A136981 A316317 * A310092 A190439 A310093

Adjacent sequences: A074734 A074735 A074736 * A074738 A074739 A074740

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Sep 05 2002

STATUS

approved