A011274 - OEIS

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A011274 as a triangular array

1

2 1

7 4 1

31 18 6 1

154 90 33 8 1

820 481 185 52 10 1

4575 2690 1065 324 75 12 1

26398 15547 6276 2006 515 102 14 1

156233 92124 37711 12468 3420 766 133 16 1

943174 556664 230277 78030 22412 5439 1085 168 18 1

A011274 as a square array

`1`	`2`	`7`	`31`	`154`	`820`	`4575`	`26398`	`156233`	`943174`
`1`	`4`	`18`	`90`	`481`	`2690`	`15547`	`92124`	`556664`
`1`	`6`	`33`	`185`	`1065`	`6276`	`37711`	`230277`
`1`	`8`	`52`	`324`	`2006`	`12468`	`78030`
`1`	`10`	`75`	`515`	`3420`	`22412`
`1`	`12`	`102`	`766`	`5439`
`1`	`14`	`133`	`1085`
`1`	`16`	`168`
`1`	`18`
`1`

A011274 as an upper right triangle

`1`	`2`	`7`	`31`	`154`	`820`	`4575`	`26398`	`156233`	`943174`
	`1`	`4`	`18`	`90`	`481`	`2690`	`15547`	`92124`	`556664`
		`1`	`6`	`33`	`185`	`1065`	`6276`	`37711`	`230277`
			`1`	`8`	`52`	`324`	`2006`	`12468`	`78030`
				`1`	`10`	`75`	`515`	`3420`	`22412`
					`1`	`12`	`102`	`766`	`5439`
						`1`	`14`	`133`	`1085`
							`1`	`16`	`168`
								`1`	`18`
									`1`

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)