A065220 - OEIS

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A065220 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`-1`
`3`		`-1`
`4`		`-1`
`5`		`0`
`6`		`2`
`7`		`6`
`8`		`13`
`9`		`25`
`10`		`45`
`11`		`78`
`12`		`132`
`13`		`220`
`14`		`363`
`15`		`595`
`16`		`971`
`17`		`1580`
`18`		`2566`
`19`		`4162`
`20`		`6745`
`21`		`10925`
`22`		`17689`
`23`		`28634`
`24`		`46344`
`25`		`75000`
`26`		`121367`
`27`		`196391`
`28`		`317783`
`29`		`514200`
`30`		`832010`
`31`		`1346238`
`32`		`2178277`
`33`		`3524545`
`34`		`5702853`
`35`		`9227430`
`36`		`14930316`
`37`		`24157780`
`38`		`39088131`
`39`		`63245947`
`40`		`102334115`
`41`		`165580100`
`42`		`267914254`

[0,0,-1,-1,-1,0,2,6,13,25,45,78,132,220,363,595, 971,1580,2566,4162,6745,10925,17689,28634,46344, 75000,121367,196391,317783,514200,832010,1346238, 2178277,3524545,5702853,9227430,14930316,24157780, 39088131,63245947,102334115,165580100,267914254]

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Last modified April 26 12:09 EDT 2024. Contains 371997 sequences. (Running on oeis4.)