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A269381 Least monotonic left inverse of A233271. 5
0, 1, 2, 2, 3, 3, 3, 4, 5, 5, 5, 5, 6, 6, 6, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 21, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = number of nonzero terms of A233271 <= n.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8192

FORMULA

Other identities. For all n >= 0:

a(A233271(n)) = n.

MATHEMATICA

nn = 90; s = NestList[# + 1 + DigitCount[#, 2, 0] &, 1, nn]; Table[Count[Take[s, n + 1], k_ /; k <= n], {n, 0, nn}]  (* Michael De Vlieger, Mar 07 2016, after Harvey P. Dale at A216431 *)

PROG

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

(define A269381 (LEFTINV-LEASTMONO 0 0 A233271))

CROSSREFS

Cf. A233271.

Cf. also A269391.

Sequence in context: A301851 A101646 A166079 * A080677 A316628 A153112

Adjacent sequences:  A269378 A269379 A269380 * A269382 A269383 A269384

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 05 2016

STATUS

approved

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Last modified August 6 11:36 EDT 2020. Contains 336246 sequences. (Running on oeis4.)