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!)
A269125 Number of sequences with n copies each of 1,2,...,7 avoiding the pattern 12...7. 2
1, 5039, 674641325, 171248808285596, 54391509124298646609, 18675035107760751336633904, 6541943110420293280017597411002, 2285085934263252199073238394141449534, 789007694236868030155290867470985247486401, 268568796699793322439632085075432144258760935329 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..100

FORMULA

a(n) = A071549(n) - A268843(n).

CROSSREFS

Row n=7 of A269129.

Cf. A071549, A268843.

Sequence in context: A309034 A237690 A290121 * A111030 A068378 A036458

Adjacent sequences:  A269122 A269123 A269124 * A269126 A269127 A269128

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Feb 19 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 August 10 14:50 EDT 2020. Contains 336381 sequences. (Running on oeis4.)