login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115857 Smallest integer m > n, such that there exists nonzero solutions to a cross-domain congruence n*i = m X i, n if no such integer exists. 9
1, 2, 7, 4, 13, 14, 11, 8, 25, 26, 31, 28, 21, 22, 19, 16, 49, 50, 23, 52, 29, 62, 47, 56, 41, 42, 31, 44, 37, 38, 35, 32, 97, 98, 39, 100, 61, 46, 63, 104, 105, 58, 59, 124, 53, 94, 55, 112, 81, 82, 55, 84, 93, 62, 59, 88, 73, 74, 63, 76, 69, 70, 67, 64, 193, 194, 71, 196, 77 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Here * stands for ordinary multiplication and X means carryless (GF(2)[X]) multiplication (A048720).

LINKS

Table of n, a(n) for n=1..69.

Index entries for sequences defined by congruent products between domains N and GF(2)[X]

CROSSREFS

a(2n) = 2*a(n). Bisection A115858 gives only the odd terms. Differs from A065621 for the first time at n=19, where a(19)=23, while A065621(19)=55. The next differences are a(21)=29 (A065621(21)=61) and a(23)=47 (A065621(23)=59). Cf. A115859, A115861, A115869, A115871, A115872.

Sequence in context: A222056 A247448 A102514 * A065621 A036565 A054787

Adjacent sequences:  A115854 A115855 A115856 * A115858 A115859 A115860

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 07 2006

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 16 01:36 EST 2017. Contains 296063 sequences.