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”).

A248665 as a triangular array

1
22
9125
641126816
6251375112542065
77762073621600111242910326
117649369754470596311787114611226521957
209715276021761146880093429764455424125497619687213700
43046721176969853309298662

A248665 as a square array

129646257776117649209715243046721
2121121375207363697547602176176969853
56811252160047059611468800309298662
16420111243117879342976
6529101146114455424
326226521254976
1957196872
13700
129646257776117649209715243046721
2121121375207363697547602176176969853
56811252160047059611468800309298662
16420111243117879342976
6529101146114455424
326226521254976
1957196872
13700