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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A241634 Number of compositions of n with exactly nine descents. 3
 55, 856, 7752, 52203, 288439, 1377331, 5868260, 22792116, 81944050, 275852636, 877202199, 2653544633, 7679263550, 21360356057, 57331068005, 148970797526, 375812977280, 922708833921, 2209559805490, 5170203452802, 11840994145688, 26581854857244, 58569145064714 (list; graph; refs; listen; history; text; internal format)
 OFFSET 27,1 LINKS Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 27..1000 MAPLE b:= proc(n, i) option remember; `if`(n=0, 1, convert(series(add(b(n-j, j)* `if`(j coeff(b(n, 0), x, 9): seq(a(n), n=27..50); MATHEMATICA b[n_, i_] := b[n, i] = If[n == 0, 1, Sum[b[n - j, j]* If[j < i, x, 1], {j, 1, n}] // Expand]; a[n_] := Coefficient[b[n, 0], x, 9]; Table[a[n], {n, 27, 50}] (* Jean-François Alcover, Nov 28 2023, from Maple code *) CROSSREFS Column k=9 of A238343 and of A238344. Sequence in context: A297523 A221786 A358634 * A008402 A281073 A329753 Adjacent sequences: A241631 A241632 A241633 * A241635 A241636 A241637 KEYWORD nonn AUTHOR Joerg Arndt and Alois P. Heinz, Apr 26 2014 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 August 7 22:54 EDT 2024. Contains 375018 sequences. (Running on oeis4.)