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”).

A223263 as a triangular array

1
55
256525
125845845125
625109852888510985625
31251428059886259886251428053125
156251856465338415858940594533841585185646515625
7812524134045115844760580933205658093320565

A223263 as a square array

152512562531251562578125
56584510985142805185646524134045
2584528885988625338415851158447605
12510985988625894059458093320565
625142805338415858093320565
31251856465
15625
152512562531251562578125
56584510985142805185646524134045
2584528885988625338415851158447605
12510985988625894059458093320565
625142805338415858093320565
31251856465
15625