login

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A049218 as a triangular array

1
01
-201
0-801
240-2001
01840-4001
-72007840-7001
0-8448024640-11201
403200-52352063840-16801
06485760-2297600144480-24001
-3628800053602560-8043200295680-33001

A049218 as a square array

10-20240-7200403200-3628800
10-801840-844806485760
10-2007840-5235205360256
10-40024640-2297600
10-70063840-804320
10-1120144480
10-168029568
10-2400
10-330
10
1
10-20240-7200403200-3628800
10-801840-844806485760
10-2007840-5235205360256
10-40024640-2297600
10-70063840-804320
10-1120144480
10-168029568
10-2400
10-330
10
1