OPDSCDLl 4^9 



*• m' 4- ( 2 J A -4- J ; m 4- A' 4- ^ 



c^w''-H(2cg4-c)m4-g*4-g 



2 ' 



<i' m* 4- ( 2 /i / -H ^ ) m 4- /»_+/ 



" a ' 



in quas ipsa decomponhur, integros habebunt valores,et nu- 

 meros triangulares compracbendenl si aequationes 



2aA4-2iA4.2cg4-2t/^4-aH-i4-c4-<i=3n 

 ^'4- /, 4- A' 4- * 4- g' 4- g -f- /' 4- / = 2 



numeris integris resolvi poterunt. 



Idem dicito de caeieris f'ormulis, caeteros terminos genera- 

 les exprimenlibiis, quod quidem vidimus superius supposilio- 

 nibus n = 5, n:=6. Id autem ut illustremus aUis exemplis sit 

 n^7^ series igilur omnes numeros triangulares conlinentes e- 

 runt hoc casu 



ideoque termini generales 



