1, 2, 6, 42, 1806, ?????
Apparently only people within an IQ of over 120, manage to complete this.
There is an attachment, but the extension is "XLS" and for some reason, it's not accepted......

Have fun!
+1 alsoDISCO wrote:3263442
tombola!laidback1952 wrote:I'm with Disco - square number and then add again?????
+1DISCO wrote:3263442