https://padlet.com/adewar3/9ezkcquv7e9fzy2l en-us 2022-03-17 13:56:39 UTC 2022-03-17 14:32:00 UTC hello@padlet.com adewar3 https://padlet.com/adewar3/9ezkcquv7e9fzy2l/wish/2100149196 P1 = 1X2 =2
P2 = 2x3 =6
p3 = 3x4 =12
P4 = 4x5 =20
Tn = n^2 +n
T376 = 376^2 +376 = 141752
376 x 377 = 141752  
Can prove the others in the same way

P1 to P2 - added on 4   = 2+4 =6
P2 to P3 - added on 6  = 6+2+4 =12
                                           2+4 +2 +4
                                       = 4+4+4  (3x4)
P3 to P4 - added on 8 = 12 +8 =20
                                        =4+4+4+4+4 (5X4)
P4 to P5 - added on 10 = 20+10 =30
= (6x5)]]> 2022-03-17 14:12:57 UTC https://padlet.com/adewar3/9ezkcquv7e9fzy2l/wish/2100149196