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A280102 Engel expansion of e to the base Pi. 1
2, 5, 20, 89, 809, 10704, 145989, 2054864, 19686928, 128199160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..9.

Eric Weisstein's World of Mathematics, Pierce Expansion

Wikipedia, Engel Expansion

EXAMPLE

e = Pi/2 + Pi^2/(2*5) + Pi^3/(2*5*20) + Pi^4/(2*5*20*89) + Pi^5/(2*5*20*89*809) + ...

CROSSREFS

Cf. A232325.

Sequence in context: A262172 A258830 A002484 * A277686 A115082 A020105

Adjacent sequences:  A280099 A280100 A280101 * A280103 A280104 A280105

KEYWORD

nonn,more

AUTHOR

G. C. Greubel, Dec 25 2016

STATUS

approved

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Last modified September 28 04:53 EDT 2021. Contains 347703 sequences. (Running on oeis4.)