Anonymous ID: 123e7d Dec. 11, 2017, 12:55 p.m. No.75123 🗄️.is 🔗kun >>5132 >>5141 >>5199 >>74975 Holy shit, 4,10, 20 Wasn't [R] ( ) 10 spaces, where is the 4 spaces? We're now at the base of the tetrahedral pyramid 20 spaces. 1,4,10,20 https://en.m.wikipedia.org/wiki/Tetrahedral_number