login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A227157 Numbers n whose factorial base representation A007623(n) doesn't contain any nonleading zeros. 15
1, 3, 5, 9, 11, 15, 17, 21, 23, 33, 35, 39, 41, 45, 47, 57, 59, 63, 65, 69, 71, 81, 83, 87, 89, 93, 95, 105, 107, 111, 113, 117, 119, 153, 155, 159, 161, 165, 167, 177, 179, 183, 185, 189, 191, 201, 203, 207, 209, 213, 215, 225, 227, 231, 233, 237, 239, 273 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(A003422(n)) = A007489(n).

a(A007489(n)) = (n+1)!-1 thus A007489(n) gives the number of terms less than (n+1)! in this sequence.

Equivalently, there are n! terms in the sequence with their magnitude in range n!..(n+1)!.

Also numbers k such that A304036(k) = 1 for k > 0. - Seiichi Manyama, May 06 2018

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000 (terms 1..5913 from Antti Karttunen)

PROG

(Scheme, with Antti Karttunen's IntSeq-library): (define A227157 (NONZERO-POS 1 1 A208575))

CROSSREFS

The sequence gives all n for which A208575(n) is not zero. Complement of A227187. Subsets: A071156 (apart from zero), A231716, A231720.

Cf. also A003422, A007489, A007623, A153880, A227130, A227132, A304036.

Sequence in context: A047270 A084060 A328574 * A024896 A160771 A249426

Adjacent sequences:  A227154 A227155 A227156 * A227158 A227159 A227160

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Jul 04 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 6 11:12 EDT 2021. Contains 343581 sequences. (Running on oeis4.)