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!)
A180905 Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=9*i and |p(i)-p(i-1)|<=9 1
1, 10, 145, 2305, 38425, 658150, 11475967, 202638268, 3611795992, 64844177233, 1170911158391, 21243152740392, 386910521871007, 7070237389426634, 129563341767875760, 2380069961493574246, 43815001110882309299 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Paths down a n-high rectangular-grid right triangle with interior neighbor fanout 2*9+1

Column 9 of A180906

LINKS

R. H. Hardin, Table of n, a(n) for n=1..100

CROSSREFS

Sequence in context: A180914 A268737 A292844 * A062744 A059968 A255522

Adjacent sequences:  A180902 A180903 A180904 * A180906 A180907 A180908

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 23 2010

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 January 29 10:34 EST 2020. Contains 331337 sequences. (Running on oeis4.)