A008517 - OEIS

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A008517 as a triangular array

1

1 2

1 8 6

1 22 58 24

1 52 328 444 120

1 114 1452 4400 3708 720

1 240 5610 32120 58140 33984 5040

1 494 19950 195800 644020 785304 341136 40320

1 1004 67260 1062500 5765500 12440064 11026296 3733920 362880

A008517 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`2`	`8`	`22`	`52`	`114`	`240`	`494`	`1004`
`6`	`58`	`328`	`1452`	`5610`	`19950`	`67260`
`24`	`444`	`4400`	`32120`	`195800`	`1062500`
`120`	`3708`	`58140`	`644020`	`5765500`
`720`	`33984`	`785304`	`12440064`
`5040`	`341136`	`11026296`
`40320`	`3733920`
`362880`

A008517 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`2`	`8`	`22`	`52`	`114`	`240`	`494`	`1004`
		`6`	`58`	`328`	`1452`	`5610`	`19950`	`67260`
			`24`	`444`	`4400`	`32120`	`195800`	`1062500`
				`120`	`3708`	`58140`	`644020`	`5765500`
					`720`	`33984`	`785304`	`12440064`
						`5040`	`341136`	`11026296`
							`40320`	`3733920`
								`362880`

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Last modified April 25 11:16 EDT 2024. Contains 371967 sequences. (Running on oeis4.)