we know that :① 13=12;② 13+23=32;③ 13+23+33=62;④ 13+23+33+62=102;what‘s the fifth one?

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we know that :① 13=12;② 13+23=32;③ 13+23+33=62;④ 13+23+33+62=102;what‘s the fifth one?
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we know that :① 13=12;② 13+23=32;③ 13+23+33=62;④ 13+23+33+62=102;what‘s the fifth one?
we know that :
① 13=12;
② 13+23=32;
③ 13+23+33=62;
④ 13+23+33+62=102;
what‘s the fifth one?

we know that :① 13=12;② 13+23=32;③ 13+23+33=62;④ 13+23+33+62=102;what‘s the fifth one?
第2个的23比12的个位和十位都多1
第3个式子中
33比32只个位多1
第4个式子中
62与62相等
且出现了102这个三位数
猜想重新开始
先从比102百位、十位=个位都多1开始
即第5个式子为
13+23+33+62+213=344
三位数全加完后出现4位数