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!)
A157073 Number of integer sequences of length n+1 with sum zero and sum of absolute values 48. 1
2, 144, 5762, 161480, 3493730, 61651128, 919453346, 11883194148, 135595653690, 1385919151540, 12835654787802, 108738668285884, 849286949294602, 6156408373152940, 41657479594194090, 264432781857156298, 1581589562174104296, 8947669593793415178 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

FORMULA

a(n)=T(n,24); T(n,k)=sum({i=1..n}binomial(n+1,i)*binomial(k-1,i-1)*binomial(n-i+k,k))

CROSSREFS

Cf. A103881, A156554.

Sequence in context: A320061 A282296 A163275 * A304461 A264153 A232998

Adjacent sequences:  A157070 A157071 A157072 * A157074 A157075 A157076

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 22 2009

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 20 04:53 EST 2021. Contains 340301 sequences. (Running on oeis4.)