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”).

A074650 as a triangular array

1
20
310
4320
56830
610201860
71540604890
82170150204116180
928112315624670312300
1036168588155425802340810560
11452401008336077351116081602184990

A074650 as a square array

1234567891011
0136101521283645
028204070112168240
0318601503155881008
064820462415543360
0911667025807735
018312234011160
0308108160
0562184
099
0
1234567891011
0136101521283645
028204070112168240
0318601503155881008
064820462415543360
0911667025807735
018312234011160
0308108160
0562184
099
0