A144155 - OEIS

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A144155 as a triangular array

1

1 1

2 1 2

5 2 2 5

15 5 4 5 15

52 15 10 10 15 52

203 52 30 25 30 52 203

877 203 104 75 75 104 203 877

4140 877 406 260 225 260 406 877 4140

21147 4140 1754 1015 780 780 1015 1754 4140 21147

A144155 as a square array

`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`	`21147`
`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
`2`	`2`	`4`	`10`	`30`	`104`	`406`	`1754`
`5`	`5`	`10`	`25`	`75`	`260`	`1015`
`15`	`15`	`30`	`75`	`225`	`780`
`52`	`52`	`104`	`260`	`780`
`203`	`203`	`406`	`1015`
`877`	`877`	`1754`
`4140`	`4140`
`21147`

A144155 as an upper right triangle

`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`	`21147`
	`1`	`1`	`2`	`5`	`15`	`52`	`203`	`877`	`4140`
		`2`	`2`	`4`	`10`	`30`	`104`	`406`	`1754`
			`5`	`5`	`10`	`25`	`75`	`260`	`1015`
				`15`	`15`	`30`	`75`	`225`	`780`
					`52`	`52`	`104`	`260`	`780`
						`203`	`203`	`406`	`1015`
							`877`	`877`	`1754`
								`4140`	`4140`
									`21147`

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Last modified April 25 11:06 EDT 2024. Contains 371967 sequences. (Running on oeis4.)