login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115136 Row sums of triangle A113647. 1
1, 4, 21, 124, 773, 4988, 33029, 223228, 1533957, 10686460, 75309061, 535920636, 3845881861, 27800469500, 202244161541, 1479594737660, 10878806654981, 80345708888060, 595788935725061, 4434080431079420, 33109442115403781 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(n)=sum(A113647(n, m), m=1..n+1), n>=0.

Conjecture: (n+2)*a(n) +(-11*n-4)*a(n-1) +(25*n-42)*a(n-2) +5*(-n+12)*a(n-3) +2*(-13*n+20)*a(n-4) +8*(2*n-7)*a(n-5)=0. - R. J. Mathar, Nov 10 2013

CROSSREFS

Sequence in context: A103769 A003014 A108404 * A101478 A153291 A244062

Adjacent sequences:  A115133 A115134 A115135 * A115137 A115138 A115139

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jan 13 2006

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 December 12 15:11 EST 2019. Contains 329960 sequences. (Running on oeis4.)