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A255833
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Index i such that A166133(i)=n, or 0 if no such i exists.
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4
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1, 2, 4, 3, 8, 7, 6, 5, 12, 11, 10, 9, 16, 15, 14, 13, 21, 20, 19, 18, 17, 24, 23, 22, 29, 28, 27, 26, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 25
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OFFSET
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1,2
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COMMENTS
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If A166133 is a permutation, as conjectured, then this is the inverse permutation.
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LINKS
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PROG
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(PARI) a(n)=for(i=1, #a166133, a166133[i]==n&&return(i)) \\ assumes a166133 defined as a vector, e.g., via {c=0; a166133=apply(t->eval(concat(Vec(t)[1+#Str(c++) .. -1])), readstr("/tmp/b166133.txt"))}
(Haskell)
import Data.List (elemIndex); import Data.Maybe (fromJust)
a255833 = (+ 1) . fromJust . (`elemIndex` a166133_list)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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