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A194626
Numbers n such that next term of Hofstadter's Q-sequence differs by 1.
5
2, 3, 5, 6, 8, 16, 17, 19, 34, 36, 39, 40, 42, 49, 69, 71, 74, 78, 80, 85, 132, 167, 175, 176, 180, 181, 225, 238, 261, 271, 320, 331, 338, 340, 341, 353, 365, 371, 507, 689, 690, 706, 721, 738, 746, 921, 932, 952, 990, 1012, 1046, 1212, 1351, 1352, 1373
OFFSET
1,1
COMMENTS
A005185(a(n)+1) = A005185(a(n)) + 1; A081827(a(n)) = 1.
LINKS
PROG
(Haskell)
import Data.List (elemIndices)
a194626 n = a194626_list !! (n-1)
a194626_list = map (+ 1) $ elemIndices 1 a081827_list
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 15 2011
STATUS
approved