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A230424 a(n) = largest natural number x such that x=n+A034968(x), or zero if no such number exists. 9
1, 3, 5, 0, 0, 7, 9, 11, 0, 0, 13, 15, 17, 0, 0, 19, 21, 23, 0, 0, 0, 0, 0, 25, 27, 29, 0, 0, 31, 33, 35, 0, 0, 37, 39, 41, 0, 0, 43, 45, 47, 0, 0, 0, 0, 0, 49, 51, 53, 0, 0, 55, 57, 59, 0, 0, 61, 63, 65, 0, 0, 67, 69, 71, 0, 0, 0, 0, 0, 73, 75, 77, 0, 0, 79 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..10079

FORMULA

a(n) = A230412(n)*(A230423(n)+1).

PROG

(Scheme)

(define (A230424 n) (if (zero? n) 1 (let ((v (A230423 n))) (if (zero? v) v (+ 1 v)))))

CROSSREFS

Cf. A034968, A230414. a(A219650(n)) = A005408(n) = 2n+1.

One more than A230423 at its nonzero points. A219658 gives the positions of zeros. Can be used to compute A230425-A230427.

Analogous sequence for binary system: A213724.

Sequence in context: A152624 A059107 A025115 * A113037 A063866 A059106

Adjacent sequences:  A230421 A230422 A230423 * A230425 A230426 A230427

KEYWORD

nonn

AUTHOR

Antti Karttunen, Oct 31 2013

STATUS

approved

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Last modified September 27 18:56 EDT 2021. Contains 347694 sequences. (Running on oeis4.)