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A269371 Least monotonic left inverse of A179016. 3
0, 1, 1, 2, 3, 3, 3, 4, 5, 5, 5, 6, 6, 6, 6, 7, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 11, 11, 11, 11, 11, 12, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 21, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

a(n) = number of nonzero terms of A179016 <= n.

Partial sums of A213719 from its term A213719(1) onward (A213719(0)=1 not included).

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..16384

FORMULA

a(0) = 0, for n > 0, a(n) = a(n-1) + A213719(n).

a(n) = A213718(n+1) - 1.

Other identities. For all n >= 0:

a(A179016(n)) = n.

PROG

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

(definec (A269371 n) (if (zero? n) n (+ (A213719 n) (A269371 (- n 1)))))

(define A269371 (LEFTINV-LEASTMONO 0 0 A179016))

CROSSREFS

Cf. A179016, A213718, A213719.

Cf. also A071542, A269381, A269401.

Sequence in context: A153161 A238516 A282692 * A287355 A194171 A004525

Adjacent sequences:  A269368 A269369 A269370 * A269372 A269373 A269374

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Mar 05 2016

STATUS

approved

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Last modified February 20 15:03 EST 2019. Contains 320327 sequences. (Running on oeis4.)