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A031289
Position of n-th 2 in A007376.
12
2, 15, 30, 32, 34, 35, 36, 38, 40, 42, 44, 46, 48, 55, 75, 95, 115, 135, 155, 175, 198, 228, 251, 254, 257, 258, 260, 263, 266, 269, 272, 275, 278, 288, 318, 348, 378, 408, 438, 468, 490, 493, 496, 498, 499, 502, 505, 508, 511, 514
OFFSET
1,1
COMMENTS
A007376(a(n)) = 2.
LINKS
PROG
(Haskell)
import Data.List (elemIndices)
a031289 n = a031289_list !! (n-1)
a031289_list = map (+ 1) $ elemIndices 2 a007376_list
-- Reinhard Zumkeller, Jul 28 2011
KEYWORD
nonn,less,base
STATUS
approved