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”).

A164678 as a triangular array

1
21
542
9862
17161493
28272520123
4746443930164
737270655640204
114113111106978055255
17016916716215313610970305
25325225024523621919114791366
365

A164678 as a square array

125917284773114170253365
14816274672113169252
2614254470111167250
29203965106162245
312305697153236
3164080136219
42055109191
42570147
53091
536
6
125917284773114170253365
14816274672113169252
2614254470111167250
29203965106162245
312305697153236
3164080136219
42055109191
42570147
53091
536
6