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A094099 Number of divisor chains of length 2n+1 which are both cyclic and anchored. 4
1, 1, 1, 1, 4, 2, 4, 47, 6, 6, 462, 372, 1589, 20896 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

A divisor chain of length n is an arrangement of 1..n such that each term is a divisor of the sum of the preceding terms.

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Cf. A067957, A094096, A094098, A094099.

Sequence in context: A168613 A248251 A139809 * A107046 A267184 A275927

Adjacent sequences:  A094096 A094097 A094098 * A094100 A094101 A094102

KEYWORD

nonn

AUTHOR

Chris Landauer (cal(AT)aero.org), May 04, 2004.

STATUS

approved

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Last modified November 19 11:09 EST 2019. Contains 329319 sequences. (Running on oeis4.)