A163280 - OEIS

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A163280 as a triangular array

1

2 4

3 6 9

5 8 12 16

7 10 15 20 25

11 14 18 24 30 36

13 22 21 28 35 42 49

17 26 27 32 40 48 56 64

19 34 33 44 45 54 63 72 81

23 38 39 52 50 60 70 80 90 100

29 46 51 68 55 66 77 88 99 110 121

31 58 57 76 65 78 84 96 108 120 132 144

A163280 as a square array

`1`	`2`	`3`	`5`	`7`	`11`	`13`	`17`	`19`	`23`	`29`	`31`
`4`	`6`	`8`	`10`	`14`	`22`	`26`	`34`	`38`	`46`	`58`
`9`	`12`	`15`	`18`	`21`	`27`	`33`	`39`	`51`	`57`
`16`	`20`	`24`	`28`	`32`	`44`	`52`	`68`	`76`
`25`	`30`	`35`	`40`	`45`	`50`	`55`	`65`
`36`	`42`	`48`	`54`	`60`	`66`	`78`
`49`	`56`	`63`	`70`	`77`	`84`
`64`	`72`	`80`	`88`	`96`
`81`	`90`	`99`	`108`
`100`	`110`	`120`
`121`	`132`
`144`

A163280 as an upper right triangle

`1`	`2`	`3`	`5`	`7`	`11`	`13`	`17`	`19`	`23`	`29`	`31`
	`4`	`6`	`8`	`10`	`14`	`22`	`26`	`34`	`38`	`46`	`58`
		`9`	`12`	`15`	`18`	`21`	`27`	`33`	`39`	`51`	`57`
			`16`	`20`	`24`	`28`	`32`	`44`	`52`	`68`	`76`
				`25`	`30`	`35`	`40`	`45`	`50`	`55`	`65`
					`36`	`42`	`48`	`54`	`60`	`66`	`78`
						`49`	`56`	`63`	`70`	`77`	`84`
							`64`	`72`	`80`	`88`	`96`
								`81`	`90`	`99`	`108`
									`100`	`110`	`120`
										`121`	`132`
											`144`

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)