1, 2, 6, 12, 16, 32, 36,,,,

Pola barisan

1....2....6....12...16...32....36

sukuganjil
1........6......16.......36...........(36+40)= 76
....+5.....+10....+20.....+40

suku genap
2........12.......32..........(32+40) = 72
..+10..... +20.......+40
.
pola 1,2,6,12,16,32,36, (72),(76)