A230424 a(n) = largest natural number x such that x=n+A034968(x), or zero if no such number exists.

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

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