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A269169 The least monotonic left inverse for A269164. 3
1, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 21, 21, 21, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 41, 41, 41, 41, 41, 41, 42, 42, 43, 44, 45, 46, 47, 48, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = number of terms of A269164 <= n.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..8192

FORMULA

Other identities. For all n >= 1:

a(A269164(n)) = n.

MATHEMATICA

terms = 100; Clear[f]; f[max_] := f[max] = (s = Sort[Table[BitXor[n, BitOr[ 2 n, 4 n]], {n, 0, max}]]; Complement[Range[Last[s]], s][[1 ;; terms]]); f[terms]; f[max = 2 terms]; While[Print[max]; f[max] != f[max/2], max = 2 max]; A269164 = f[max]; a[n_] := Count[A269164, k_ /; k <= n]; Table[ a[n], {n, 1, Length[A269164]}] (* Jean-Fran├žois Alcover, Feb 23 2016 *)

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A269169 (LEFTINV-LEASTMONO 1 1 A269164))

CROSSREFS

Cf. A269164, A269167.

Sequence in context: A082287 A331267 A238839 * A248148 A210062 A245337

Adjacent sequences:  A269166 A269167 A269168 * A269170 A269171 A269172

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 21 2016

STATUS

approved

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Last modified July 25 22:38 EDT 2021. Contains 346294 sequences. (Running on oeis4.)