The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A264469 Number of permutations of [n] with exactly ten (possibly overlapping) occurrences of the generalized pattern 23-1. 2
 4, 432, 10723, 185030, 2679741, 35436222, 447105877, 5525656829, 67836294722, 834260210092, 10332749157300, 129333951912536, 1639800629344515, 21092071947142268, 275512690552878512, 3657197040905519063, 49353853545913899116, 677272710732166102115 (list; graph; refs; listen; history; text; internal format)
 OFFSET 7,1 LINKS Alois P. Heinz, Table of n, a(n) for n = 7..500 EXAMPLE a(7) = 4: 4567231, 5672341, 5673412, 5673421. MAPLE b:= proc(u, o) option remember; `if`(u+o=0, 1, add( b(u-j, o+j-1), j=1..u) +add(convert(series( b(u+j-1, o-j)*x^u, x, 11), polynom), j=1..o)) end: a:= n-> coeff(b(n, 0), x, 10): seq(a(n), n=7..25); CROSSREFS Column k=10 of A260670. Sequence in context: A201980 A080321 A360844 * A369395 A172858 A125760 Adjacent sequences: A264466 A264467 A264468 * A264470 A264471 A264472 KEYWORD nonn AUTHOR Alois P. Heinz, Nov 14 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 3 06:28 EST 2024. Contains 370499 sequences. (Running on oeis4.)