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!)
A263892 Number of permutations of [n] containing exactly eight occurrences of the consecutive pattern 132. 2
2027025, 2266145280, 467264653965, 52135907088384, 4183054629844995, 273302114875729920, 15559739185621805235, 804731991294567628800, 38866311953961514404975, 1787021214083758837555200, 79318135487882387789779275, 3434027248121360673543782400 (list; graph; refs; listen; history; text; internal format)
OFFSET

17,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 17..100

FORMULA

a(n) = A197365(n,8).

MAPLE

b:= proc(u, o, t) option remember; series(`if`(u+o=0, 1,

      add(b(u-j, o+j-1, 0)*`if`(j<=t, x, 1), j=1..u)+

      add(b(u+j-1, o-j, j-1), j=1..o)), x, 9)

    end:

a:= n-> coeff(b(n, 0$2), x, 8):

seq(a(n), n=17..35);

CROSSREFS

Column k=8 of A197365.

Sequence in context: A104441 A290037 A289956 * A163682 A045871 A272598

Adjacent sequences:  A263889 A263890 A263891 * A263893 A263894 A263895

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 28 2015

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 13 00:57 EDT 2021. Contains 344980 sequences. (Running on oeis4.)