A104321 Smallest number m such that A104320(m)=n.

0, 5, 8, 18, 13, 26, 27, 23, 42, 25, 37, 58, 47, 46, 61, 67, 54, 71, 77, 73, 88, 99, 141, 100, 115, 114, 119, 117, 113, 112, 109, 135, 110, 127, 133, 136, 164, 162, 177, 186, 193, 195, 163, 189, 201, 196, 191, 199, 206, 188, 208, 200, 221, 266, 235, 234, 238, 280

Offset

0,2

Comments

A104320(a(n))=n and A104320(m)<>n for m<a(n).

If it exists, a(115) > 10^5. - Michel Marcus, Oct 19 2016

Links

Michel Marcus, Table of n, a(n) for n = 0..114

Prog

(PARI) a(n) = {my(k = 0); while (#select(x->(x==0), digits(2^k, 3)) != n, k++); k; } \\ Michel Marcus, Oct 19 2016

Crossrefs

Cf. A036462.

Sequence in context: A246638 A192170 A280251 * A196934 A359949 A291752

Adjacent sequences: A104318 A104319 A104320 * A104322 A104323 A104324

Keyword

nonn

Author

Reinhard Zumkeller, Mar 01 2005

Status

approved