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A031290 Position of n-th 3 in A007376. 12
3, 17, 37, 50, 52, 54, 56, 57, 58, 60, 62, 64, 66, 68, 77, 97, 117, 137, 157, 177, 201, 231, 261, 281, 284, 287, 290, 291, 293, 296, 299, 302, 305, 308, 321, 351, 381, 411, 441, 471, 501, 531, 561, 581, 584, 587, 590, 591, 593, 596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A007376(a(n)) = 3.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

import Data.List (elemIndices)

a031290 n = a031290_list !! (n-1)

a031290_list = map (+ 1) $ elemIndices 3 a007376_list

-- Reinhard Zumkeller, Jul 28 2011

CROSSREFS

Cf. A193428; A031287, A031288, A031289, A031291, A031292, A031293, A031294, A031295, A031296.

Sequence in context: A146133 A297735 A266062 * A152908 A031386 A146813

Adjacent sequences:  A031287 A031288 A031289 * A031291 A031292 A031293

KEYWORD

nonn,less,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 12 22:46 EDT 2020. Contains 335669 sequences. (Running on oeis4.)