78 = 0+1+2+3+4+5+6+7+8+9+10+11+12
231 = 0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21
231 = 3rd 78-agonal Number
231 = Partitions of 16
231 = 7th Octahedral Number
96 = 0+1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+1+2+3
96 = 6th Octagonal Number
10x4 = 4th Octagonal Number
No comments:
Post a Comment