

A198094


3rd term of continued fraction for sqrt(2)^sqrt(2)^...^sqrt(2) with n sqrt(2)'s.


6



2, 1, 3, 5, 8, 12, 19, 28, 41, 60, 87, 127, 183, 266, 384, 555, 802, 1158, 1671, 2412, 3480, 5022, 7246, 10455, 15084, 21763, 31398, 45298, 65353, 94285, 136025, 196244, 283121, 408458, 589281, 850154, 1226514, 1769486, 2552829, 3682955, 5313382
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OFFSET

1,1


COMMENTS

1st terms are 1,1,1,1,1,... and 2nd terms are 2,1,1,1,1,...


LINKS

G. C. Greubel, Table of n, a(n) for n = 1..251


FORMULA

a(n) ~ c / log(2)^n, where c = 1/A277435 = 1.582031511247872306827383...  Vladimir Reshetnikov, Oct 18 2016


MATHEMATICA

ContinuedFraction[#, 3][[3]] & /@ NestList[Sqrt[2]^# &, Sqrt[2], 40]


PROG

(PARI) a(n) = {my(c = sqrt(2)); for (k=1, n1, c = sqrt(2)^c); contfrac(c)[3]; } \\ Michel Marcus, Oct 19 2016


CROSSREFS

Cf. A002193, A078333, A194348.
Cf. A260691, A277435.
Sequence in context: A135017 A070168 A246646 * A263047 A021828 A094341
Adjacent sequences: A198091 A198092 A198093 * A198095 A198096 A198097


KEYWORD

nonn,easy


AUTHOR

Vladimir Reshetnikov, Oct 30 2011


STATUS

approved



