A156564 - OEIS

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A156564 as a triangular array

1

1 1

1 1 2

1 2 3 6

1 3 40 35 24

1 4 165 8372 1755 120

1 5 456 159831 17174080 382075 720

1 6 1015 1387064 2572040925 329455658840 354205467 5040

1 7 1968 7773755 107605514016 670559078523807 57782732285824000 1368556206875 40320

A156564 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`1`	`2`	`3`	`4`	`5`	`6`	`7`
`2`	`3`	`40`	`165`	`456`	`1015`	`1968`
`6`	`35`	`8372`	`159831`	`1387064`	`7773755`
`24`	`1755`	`17174080`	`2572040925`	`107605514016`
`120`	`382075`	`329455658840`	`670559078523807`
`720`	`354205467`	`57782732285824000`
`5040`	`1368556206875`
`40320`

A156564 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`1`	`2`	`3`	`4`	`5`	`6`	`7`
		`2`	`3`	`40`	`165`	`456`	`1015`	`1968`
			`6`	`35`	`8372`	`159831`	`1387064`	`7773755`
				`24`	`1755`	`17174080`	`2572040925`	`107605514016`
					`120`	`382075`	`329455658840`	`670559078523807`
						`720`	`354205467`	`57782732285824000`
							`5040`	`1368556206875`
								`40320`

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Last modified May 23 15:34 EDT 2024. Contains 372763 sequences. (Running on oeis4.)