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A059983
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First occurrence of n in A007599.
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1
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1, 0, 6, 7, 8, 9, 12, 13, 14, 15, 18, 19, 22, 23, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 42, 43, 46, 47, 50, 51, 54, 55, 58, 59, 62, 63, 66, 67, 70, 71, 74, 75, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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EXAMPLE
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a(5) does not appear in A007599 until the 9th entry, keeping in mind the offset.
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MATHEMATICA
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a[n_Integer] := a[n] = (a[n - 1] + Nest[a, n - 2, Floor[n/2] ] ); a[0] = 1; a[1] = 0; b[n_Integer] := (k = 0; While[ a[k] != n, k++ ]; k); Table[ b[n], {n, 0, 75} ]
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PROG
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(Haskell)
import Data.List (elemIndex)
import Data.Maybe (mapMaybe)
a059983 n = a059983_list !! n
a059983_list = mapMaybe (`elemIndex` a007599_list) [0..]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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