A131239 - OEIS

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A131239 as a triangular array

1

1 1

1 4 1

1 5 7 1

1 8 12 10 1

1 9 24 22 13 1

1 12 33 52 35 16 1

1 13 51 85 95 51 19 1

1 16 64 148 180 156 70 22 1

1 17 88 212 348 336 238 92 25 1

1 20 105 320 560 714 574 344 117 28 1

1 21 135 425 920 1274 1330 918 477 145 31 1

A131239 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`	`7`	`12`	`24`	`33`	`51`	`64`	`88`	`105`	`135`
`1`	`10`	`22`	`52`	`85`	`148`	`212`	`320`	`425`
`1`	`13`	`35`	`95`	`180`	`348`	`560`	`920`
`1`	`16`	`51`	`156`	`336`	`714`	`1274`
`1`	`19`	`70`	`238`	`574`	`1330`
`1`	`22`	`92`	`344`	`918`
`1`	`25`	`117`	`477`
`1`	`28`	`145`
`1`	`31`
`1`

A131239 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`	`7`	`12`	`24`	`33`	`51`	`64`	`88`	`105`	`135`
			`1`	`10`	`22`	`52`	`85`	`148`	`212`	`320`	`425`
				`1`	`13`	`35`	`95`	`180`	`348`	`560`	`920`
					`1`	`16`	`51`	`156`	`336`	`714`	`1274`
						`1`	`19`	`70`	`238`	`574`	`1330`
							`1`	`22`	`92`	`344`	`918`
								`1`	`25`	`117`	`477`
									`1`	`28`	`145`
										`1`	`31`
											`1`

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Last modified September 18 23:03 EDT 2024. Contains 376002 sequences. (Running on oeis4.)