A221378 - OEIS

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A221378 as a triangular array

1

3 3

7 19 7

17 139 139 17

41 1035 3017 1035 41

99 7723 68006 68006 7723 99

239 57643 1548941 4616125 1548941 57643 239

577 430251 35365731 318041768 318041768 35365731 430251 577

1393 3211435 807887304

A221378 as a square array

`1`	`3`	`7`	`17`	`41`	`99`	`239`	`577`	`1393`
`3`	`19`	`139`	`1035`	`7723`	`57643`	`430251`	`3211435`
`7`	`139`	`3017`	`68006`	`1548941`	`35365731`	`807887304`
`17`	`1035`	`68006`	`4616125`	`318041768`
`41`	`7723`	`1548941`	`318041768`
`99`	`57643`	`35365731`
`239`	`430251`
`577`

A221378 as an upper right triangle

`1`	`3`	`7`	`17`	`41`	`99`	`239`	`577`	`1393`
	`3`	`19`	`139`	`1035`	`7723`	`57643`	`430251`	`3211435`
		`7`	`139`	`3017`	`68006`	`1548941`	`35365731`	`807887304`
			`17`	`1035`	`68006`	`4616125`	`318041768`
				`41`	`7723`	`1548941`	`318041768`
					`99`	`57643`	`35365731`
						`239`	`430251`
							`577`

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)