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A078432 Number of permutations p of 1,2,...,n such that the denominator of the continued fraction [p(1); p(2),...,p(n)] is prime. 2
0, 1, 4, 14, 32, 204, 994, 7526, 48636, 421392, 4018976, 41304726, 490878388 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Cf. A078431, A078433.

Sequence in context: A323723 A324042 A099590 * A124786 A322009 A228272

Adjacent sequences:  A078429 A078430 A078431 * A078433 A078434 A078435

KEYWORD

more,nonn

AUTHOR

Reiner Martin (reinermartin(AT)hotmail.com), Dec 30 2002

EXTENSIONS

a(10)-a(13) from Robert Gerbicz, Nov 27 2010

STATUS

approved

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Last modified January 28 12:58 EST 2020. Contains 331321 sequences. (Running on oeis4.)