|
Search: id:A081408
|
|
|
| A081408 |
|
a[n]=(n+1).a[n-5], a[0]=a[1]=a[2]=a[3]=a[4]=1;. |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 6, 7, 8, 9, 10, 66, 84, 104, 126, 150, 1056, 1428, 1872, 2394, 3000, 22176, 31416, 43056, 57456, 75000, 576576, 848232, 1205568, 1666224, 2250000, 17873856, 27143424, 39783744, 56651616, 78750000, 643458816, 1004306688, 1511782272
(list; graph; listen)
|
|
|
OFFSET
|
0,6
|
|
|
COMMENT
|
Quintic factorial sequences are generated by single 5-order recursion and appear in unified form.
|
|
EXAMPLE
|
A008548, A034323, A034300, A034301, A034325 sequences are combed together as A081408(5n+r) with r=0,1,2,3,4.
|
|
MATHEMATICA
|
f[x_] := (x+1)*f[x-5] {f[0]=1, f[1]=1; f[2]=1; f[3]=1, f[4]=1}; Table[f[w], {w, 1, 50}]
|
|
CROSSREFS
|
Cf. A001147, A002866, A034001, A007599, A034000, A007696, A000407, A034176, A034177, A008548, A034323, A034300, A034301, A034325 [double, triple, quartic, quintic, factorial subsequences], generated together in A081405-A081408.
Sequence in context: A115840 A058368 A108613 this_sequence A143616 A005050 A120191
Adjacent sequences: A081405 A081406 A081407 this_sequence A081409 A081410 A081411
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Labos E. (labos(AT)ana.sote.hu), Apr 01 2003
|
|
|
Search completed in 0.005 seconds
|
