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!)
A303651 Main diagonal of irregular triangle A303650. 3
1, 3, 15, 100, 840, 8589, 104104, 1463760, 23457780, 422352880, 8443603509, 185620024044, 4450814005365, 115607871091860, 3233811469903935, 96919878129098048, 3098520826729103844, 105255099799959987720, 3785952834976524485140, 143750180460098987633040, 5745630052052437089326175, 241143250707191288860686084, 10603124545177769605263358275, 487432649463606266257377179400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Paul D. Hanna, Table of n, a(n) for n = 0..50

CROSSREFS

Cf. A303650, A303652.

Sequence in context: A135883 A147664 A219779 * A196962 A074521 A074536

Adjacent sequences:  A303648 A303649 A303650 * A303652 A303653 A303654

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Apr 30 2018

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 7 20:21 EST 2019. Contains 329847 sequences. (Running on oeis4.)