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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A277896 a(n) = the least k > n for which A048675(k) = A048675(n), 0 if no such number exists (when n is a power of 2). 4
0, 0, 4, 0, 9, 8, 25, 0, 12, 18, 49, 16, 121, 50, 20, 0, 169, 24, 289, 27, 28, 98, 361, 32, 45, 242, 36, 75, 529, 40, 841, 0, 44, 338, 63, 48, 961, 578, 52, 54, 1369, 56, 1681, 147, 60, 722, 1849, 64, 175, 90, 68, 363, 2209, 72, 99, 150, 76, 1058, 2809, 80, 3481, 1682, 84, 0, 117, 88, 3721, 507, 92, 126, 4489, 96, 5041, 1922, 100, 867, 275 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Apart from zeros, a permutation of A013929.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..192

FORMULA

a(A000079(n)) = 0.

For all n, except powers of two, a(n) >= A277893(n).

PROG

(Scheme) (define (A277896 n) (if (= 1 (A209229 n)) 0 (let ((v (A048675 n))) (let loop ((k (+ 1 n))) (if (= (A048675 k) v) k (loop (+ 1 k)))))))

CROSSREFS

Cf. A000079, A013929, A048675, A209229, A277886, A277893, A277905.

Numbers not in this sequence: A005117 (A019565).

Sequence in context: A021248 A269843 A247127 * A195056 A186861 A187027

Adjacent sequences:  A277893 A277894 A277895 * A277897 A277898 A277899

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 15 2016

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 June 19 04:44 EDT 2019. Contains 324217 sequences. (Running on oeis4.)