A020471 - OEIS

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A020471 as a simple table

`n`		`a(n)`
`1`		`7`
`2`		`79`
`3`		`97`
`4`		`797`
`5`		`977`
`6`		`997`
`7`		`77797`
`8`		`77977`
`9`		`77999`
`10`		`79777`
`11`		`79979`
`12`		`79997`
`13`		`79999`
`14`		`97777`
`15`		`777977`
`16`		`777979`
`17`		`779797`
`18`		`797977`
`19`		`799979`
`20`		`799999`
`21`		`999979`
`22`		`7777997`
`23`		`7779979`
`24`		`7779997`
`25`		`7797799`
`26`		`7797997`
`27`		`7799797`
`28`		`7799999`
`29`		`7977779`
`30`		`7977797`
`31`		`7977799`
`32`		`7977997`

[7,79,97,797,977,997,77797,77977,77999,79777, 79979,79997,79999,97777,777977,777979,779797, 797977,799979,799999,999979,7777997,7779979, 7779997,7797799,7797997,7799797,7799999,7977779, 7977797,7977799,7977997]

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)