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A261788 a(n) = smallest k such that A261786(k) >= 3^n. 2
1, 2, 5, 12, 30, 81, 224, 626, 1747, 4909, 13811 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

PROG

(Haskell)

a261788 n = a261788_list !! (n-1)

a261788_list = f 1 1 a261786_list' where

   f z k (x:xs) | x >= z    = k : f (3 * z) (k + 1) xs

                | otherwise = f z (k + 1) xs

CROSSREFS

Cf. A261786, A000244, A261396, A261806.

Sequence in context: A213263 A179544 A182488 * A112412 A309506 A319557

Adjacent sequences:  A261785 A261786 A261787 * A261789 A261790 A261791

KEYWORD

nonn,more

AUTHOR

Reinhard Zumkeller, Sep 01 2015

STATUS

approved

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Last modified June 22 12:56 EDT 2021. Contains 345380 sequences. (Running on oeis4.)