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”).

A272865 as a triangular array

4
24160
1329365700
720531233264198144
39402988019098011556006823620
216721677121088856667065639786120233908896
11981294164061895403830097623034074013636672567997325700

A272865 as a square array

424132720394021672119812
160936531229880167712941640
57003326419098010888566189540
1981441155600667065638300976
682362039786120230340740
2339088961363667256
7997325700
424132720394021672119812
160936531229880167712941640
57003326419098010888566189540
1981441155600667065638300976
682362039786120230340740
2339088961363667256
7997325700