A108390 - OEIS

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A108390 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`7`
`4`		`7`
`5`		`-1`
`6`		`25`
`7`		`25`
`8`		`1`
`9`		`111`
`10`		`111`
`11`		`-1`
`12`		`465`
`13`		`465`
`14`		`1`
`15`		`1975`
`16`		`1975`
`17`		`-1`
`18`		`8361`
`19`		`8361`
`20`		`1`
`21`		`35423`
`22`		`35423`
`23`		`-1`
`24`		`150049`
`25`		`150049`
`26`		`1`
`27`		`635623`
`28`		`635623`
`29`		`-1`
`30`		`2692537`
`31`		`2692537`
`32`		`1`
`33`		`11405775`
`34`		`11405775`
`35`		`-1`
`36`		`48315633`
`37`		`48315633`
`38`		`1`
`39`		`204668311`
`40`		`204668311`
`41`		`-1`
`42`		`866988873`
`43`		`866988873`
`44`		`1`
`45`		`3672623807`
`46`		`3672623807`
`47`		`-1`

[1,1,1,7,7,-1,25,25,1,111,111,-1,465,465,1,1975, 1975,-1,8361,8361,1,35423,35423,-1,150049,150049, 1,635623,635623,-1,2692537,2692537,1,11405775, 11405775,-1,48315633,48315633,1,204668311, 204668311,-1,866988873,866988873,1,3672623807, 3672623807,-1]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)