A038221 - OEIS

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A038221 as a triangular array

1

3 3

9 18 9

27 81 81 27

81 324 486 324 81

243 1215 2430 2430 1215 243

729 4374 10935 14580 10935 4374 729

2187 15309 45927 76545 76545 45927 15309 2187

6561 52488 183708 367416 459270 367416 183708 52488 6561

A038221 as a square array

`1`	`3`	`9`	`27`	`81`	`243`	`729`	`2187`	`6561`
`3`	`18`	`81`	`324`	`1215`	`4374`	`15309`	`52488`
`9`	`81`	`486`	`2430`	`10935`	`45927`	`183708`
`27`	`324`	`2430`	`14580`	`76545`	`367416`
`81`	`1215`	`10935`	`76545`	`459270`
`243`	`4374`	`45927`	`367416`
`729`	`15309`	`183708`
`2187`	`52488`
`6561`

A038221 as an upper right triangle

`1`	`3`	`9`	`27`	`81`	`243`	`729`	`2187`	`6561`
	`3`	`18`	`81`	`324`	`1215`	`4374`	`15309`	`52488`
		`9`	`81`	`486`	`2430`	`10935`	`45927`	`183708`
			`27`	`324`	`2430`	`14580`	`76545`	`367416`
				`81`	`1215`	`10935`	`76545`	`459270`
					`243`	`4374`	`45927`	`367416`
						`729`	`15309`	`183708`
							`2187`	`52488`
								`6561`

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)