A143777 - OEIS

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A143777 as a triangular array

1

1 1

1 4 2

1 13 26 7

1 40 260 280 47

1 121 2420 8470 5687 628

A143777 as a square array

`1`	`1`	`1`	`1`	`1`	`1`
`1`	`4`	`13`	`40`	`121`
`2`	`26`	`260`	`2420`
`7`	`280`	`8470`
`47`	`5687`
`628`

A143777 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`4`	`13`	`40`	`121`
		`2`	`26`	`260`	`2420`
			`7`	`280`	`8470`
				`47`	`5687`
					`628`

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)