A131819 - OEIS

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A131819 as a triangular array

1

4 2

8 5 3

13 9 7 4

19 14 12 9 5

26 20 18 15 11 6

34 27 25 22 18 13 7

43 35 33 30 26 21 15 8

53 44 42 39 35 30 24 17 9

64 54 52 49 45 40 34 27 19 10

76 65 63 60 56 51 45 38 30 21 11

A131819 as a square array

`1`	`4`	`8`	`13`	`19`	`26`	`34`	`43`	`53`	`64`	`76`
`2`	`5`	`9`	`14`	`20`	`27`	`35`	`44`	`54`	`65`
`3`	`7`	`12`	`18`	`25`	`33`	`42`	`52`	`63`
`4`	`9`	`15`	`22`	`30`	`39`	`49`	`60`
`5`	`11`	`18`	`26`	`35`	`45`	`56`
`6`	`13`	`21`	`30`	`40`	`51`
`7`	`15`	`24`	`34`	`45`
`8`	`17`	`27`	`38`
`9`	`19`	`30`
`10`	`21`
`11`

A131819 as an upper right triangle

`1`	`4`	`8`	`13`	`19`	`26`	`34`	`43`	`53`	`64`	`76`
	`2`	`5`	`9`	`14`	`20`	`27`	`35`	`44`	`54`	`65`
		`3`	`7`	`12`	`18`	`25`	`33`	`42`	`52`	`63`
			`4`	`9`	`15`	`22`	`30`	`39`	`49`	`60`
				`5`	`11`	`18`	`26`	`35`	`45`	`56`
					`6`	`13`	`21`	`30`	`40`	`51`
						`7`	`15`	`24`	`34`	`45`
							`8`	`17`	`27`	`38`
								`9`	`19`	`30`
									`10`	`21`
										`11`

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Last modified September 8 08:54 EDT 2024. Contains 375753 sequences. (Running on oeis4.)