A221507 - OEIS

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A221507 as a triangular array

0

1 0

0 9 0

1 44 64 0

0 446 664 441 0

1 3334 31663 12495 3025 0

0 27540 730874 2691211 221614 20736 0

1 219070 22664752 223123842 219689604 4010052 142129 0

0 1766136 617892584 26917553016 61691224718

A221507 as a square array

`0`	`1`	`0`	`1`	`0`	`1`	`0`	`1`	`0`
`0`	`9`	`44`	`446`	`3334`	`27540`	`219070`	`1766136`
`0`	`64`	`664`	`31663`	`730874`	`22664752`	`617892584`
`0`	`441`	`12495`	`2691211`	`223123842`	`26917553016`
`0`	`3025`	`221614`	`219689604`	`61691224718`
`0`	`20736`	`4010052`
`0`	`142129`
`0`

A221507 as an upper right triangle

`0`	`1`	`0`	`1`	`0`	`1`	`0`	`1`	`0`
	`0`	`9`	`44`	`446`	`3334`	`27540`	`219070`	`1766136`
		`0`	`64`	`664`	`31663`	`730874`	`22664752`	`617892584`
			`0`	`441`	`12495`	`2691211`	`223123842`	`26917553016`
				`0`	`3025`	`221614`	`219689604`	`61691224718`
					`0`	`20736`	`4010052`
						`0`	`142129`
							`0`

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)