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”).

A278280 as a triangular array

0
00
020
0450
01325160
036122136490
010966114618391530
03173723157281684250134760
0938207361720913506491967263037014830
027541154461870365746662779745612293193

A278280 as a square array

0000000000
02413361093179382754
0525122661372320736115446
0161361461157281720911870365
049839168423506497466627
015350131967267974561
0476303702293193
01483
0
0000000000
02413361093179382754
0525122661372320736115446
0161361461157281720911870365
049839168423506497466627
015350131967267974561
0476303702293193
01483
0