login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A218842 as a triangular array

1
21
471
720211
125793651
211564534362001
374382050361720436161
65122095162663528888957318971
1143398441292019603465012307264485758421
200946820478015308464299802

A218842 as a square array

124712213765114200
172057156438122033989468
121934532050951644129204780
1654363617266352019601530846
12002043288883465014299802
16169573230726
1189744857
15842
1

A218842 as an upper right triangle

124712213765114200
172057156438122033989468
121934532050951644129204780
1654363617266352019601530846
12002043288883465014299802
16169573230726
1189744857
15842
1

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 3 15:45 EST 2021. Contains 349463 sequences. (Running on oeis4.)