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Inverse permutation to A203069.
3

%I #16 Mar 26 2022 14:32:17

%S 1,4,7,12,11,8,3,2,9,14,13,6,5,22,15,10,17,16,21,26,23,18,19,24,25,20,

%T 29,28,27,30,33,32,31,34,35,40,37,38,39,36,41,44,43,42,45,46,47,48,57,

%U 58,49,54,53,50,59,56,51,52,55,60,61,62,63,68,67,64,65

%N Inverse permutation to A203069.

%H Reinhard Zumkeller, <a href="/A249918/b249918.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%o (Haskell)

%o import Data.List (elemIndex); import Data.Maybe (fromJust)

%o a249918 = (+ 1) . fromJust . (`elemIndex` a203069_list)

%Y Cf. A203069, A249920.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jan 14 2015