A181731 - OEIS

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A181731 as a triangular array

1

1 1

1 2 2

1 6 14 4

1 24 222 106 8

1 120 6384 9918 838 16

1 720 291720 2306904 486924 6802 32

1 5040 19445040 1085674320 964948464 25267236 56190 64

1 40320 1781750880 906140159280 4927561419120 439331916888 1359631776 470010 128

1 362880 214899027840 1224777388630320 54259623434853360

A181731 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`2`	`6`	`24`	`120`	`720`	`5040`	`40320`	`362880`
`2`	`14`	`222`	`6384`	`291720`	`19445040`	`1781750880`	`214899027840`
`4`	`106`	`9918`	`2306904`	`1085674320`	`906140159280`	`1224777388630320`
`8`	`838`	`486924`	`964948464`	`4927561419120`	`54259623434853360`
`16`	`6802`	`25267236`	`439331916888`
`32`	`56190`	`1359631776`
`64`	`470010`
`128`

A181731 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`2`	`6`	`24`	`120`	`720`	`5040`	`40320`	`362880`
		`2`	`14`	`222`	`6384`	`291720`	`19445040`	`1781750880`	`214899027840`
			`4`	`106`	`9918`	`2306904`	`1085674320`	`906140159280`	`1224777388630320`
				`8`	`838`	`486924`	`964948464`	`4927561419120`	`54259623434853360`
					`16`	`6802`	`25267236`	`439331916888`
						`32`	`56190`	`1359631776`
							`64`	`470010`
								`128`

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)