- Pythagorean: 7+9+5+7 = 28 (7th Triangular, SOD:56, PR:1
07[17 {7th Prime}] TR:406[46 {SOD:72, PR:199, TR:1081[181 {42nd Prime}]}], Perfect Number) - Simple: 7+18+5+25 = 55 (1
0th Triangular;Fibonacci, SOD:72, PR:257, TR:1540[154])
Other Methods
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