Problem 282
The Ackermann function
For non-negative integers m, n, the Ackermann function A(m, n) is defined as follows:
For example A(1, 0) = 2, A(2, 2) = 7 and A(3, 4) = 125.
Find $\Sigma^6_{n=0}A(n,n)$ and give your answer mod 148.
阿克曼函数
对于非负整数m和n,阿克曼函数A(m, n)按如下方式定义:
例如,A(1, 0) = 2,A(2, 2) = 7,以及A(3, 4) = 125。
求$\Sigma^6_{n=0}A(n,n)$,并将你的答案模148取余。