A166455 - OEIS

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A166455 as a triangular array

1

1 1

1 4 1

1 5 5 1

1 8 12 8 1

1 9 20 20 9 1

1 12 29 40 29 12 1

1 13 41 69 69 41 13 1

1 16 56 112 140 112 56 16 1

1 17 72 168 252 252 168 72 17 1

1 20 89 240 420 504 420 240 89 20 1

1 21 109 329 660 924 924 660 329 109 21 1

A166455 as a square array

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
`1`	`4`	`5`	`8`	`9`	`12`	`13`	`16`	`17`	`20`	`21`
`1`	`5`	`12`	`20`	`29`	`41`	`56`	`72`	`89`	`109`
`1`	`8`	`20`	`40`	`69`	`112`	`168`	`240`	`329`
`1`	`9`	`29`	`69`	`140`	`252`	`420`	`660`
`1`	`12`	`41`	`112`	`252`	`504`	`924`
`1`	`13`	`56`	`168`	`420`	`924`
`1`	`16`	`72`	`240`	`660`
`1`	`17`	`89`	`329`
`1`	`20`	`109`
`1`	`21`
`1`

A166455 as an upper right triangle

`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`	`1`
	`1`	`4`	`5`	`8`	`9`	`12`	`13`	`16`	`17`	`20`	`21`
		`1`	`5`	`12`	`20`	`29`	`41`	`56`	`72`	`89`	`109`
			`1`	`8`	`20`	`40`	`69`	`112`	`168`	`240`	`329`
				`1`	`9`	`29`	`69`	`140`	`252`	`420`	`660`
					`1`	`12`	`41`	`112`	`252`	`504`	`924`
						`1`	`13`	`56`	`168`	`420`	`924`
							`1`	`16`	`72`	`240`	`660`
								`1`	`17`	`89`	`329`
									`1`	`20`	`109`
										`1`	`21`
											`1`

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Last modified April 23 12:59 EDT 2024. Contains 371913 sequences. (Running on oeis4.)