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A280091 Pierce Expansion of tanh(1). 1
1, 4, 21, 38, 117, 7135, 7809, 1614095, 3624914, 8425892, 16789093, 18206374, 20026429, 106066483, 297533015, 329807820, 393798971, 762907505, 98220075842, 124475838767, 132042717951, 252079930415, 308550332741, 1938650338119, 10430003444835, 12126839108751 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

Eric Weisstein's World of Mathematics, Pierce Expansion

Wikipedia, Engel Expansion

MATHEMATICA

PierceExp[A_, n_] := Join[Array[1 &, Floor[A]], First@Transpose@ NestList[{Floor[1/Expand[1 - #[[1]] #[[2]]]], Expand[1 - #[[1]] #[[2]]]} &, {Floor[1/(A - Floor[A])], A - Floor[A]}, n - 1]]; PierceExp[N[Tanh[1] , 7!], 50]

CROSSREFS

Cf. A073744 (tanh(1)).

Sequence in context: A204557 A161444 A188219 * A086474 A085703 A063122

Adjacent sequences:  A280088 A280089 A280090 * A280092 A280093 A280094

KEYWORD

nonn

AUTHOR

G. C. Greubel, Dec 25 2016

STATUS

approved

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Last modified July 24 03:48 EDT 2017. Contains 289717 sequences.