A028246 - OEIS

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A028246 as a triangular array

1

1 1

1 3 2

1 7 12 6

1 15 50 60 24

1 31 180 390 360 120

1 63 602 2100 3360 2520 720

1 127 1932 10206 25200 31920 20160 5040

1 255 6050 46620 166824 317520 332640 181440 40320

1 511 18660 204630 1020600 2739240 4233600 3780000 1814400 362880

A028246 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`3`	`7`	`15`	`31`	`63`	`127`	`255`	`511`
`2`	`12`	`50`	`180`	`602`	`1932`	`6050`	`18660`
`6`	`60`	`390`	`2100`	`10206`	`46620`	`204630`
`24`	`360`	`3360`	`25200`	`166824`	`1020600`
`120`	`2520`	`31920`	`317520`	`2739240`
`720`	`20160`	`332640`	`4233600`
`5040`	`181440`	`3780000`
`40320`	`1814400`
`362880`

A028246 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`3`	`7`	`15`	`31`	`63`	`127`	`255`	`511`
		`2`	`12`	`50`	`180`	`602`	`1932`	`6050`	`18660`
			`6`	`60`	`390`	`2100`	`10206`	`46620`	`204630`
				`24`	`360`	`3360`	`25200`	`166824`	`1020600`
					`120`	`2520`	`31920`	`317520`	`2739240`
						`720`	`20160`	`332640`	`4233600`
							`5040`	`181440`	`3780000`
								`40320`	`1814400`
									`362880`

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