以下是一种实现方法，其中使用了OpenZeppelin库：

1. 导入OpenZeppelin库

pragma solidity ^0.5.0;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.1/contracts/token/ERC20/ERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.1/contracts/token/ERC20/ERC20Detailed.sol";

2. 创建ERC20代币 contract

contract MyToken is ERC20, ERC20Detailed {
    constructor(string memory name, string memory symbol, uint8 decimals)
        ERC20Detailed(name, symbol, decimals)
        public
    {
    }
}

3. 创建铸币函数以触发ERC-token的铸造

function mintOnNthLike(uint256 n) public {
        require(n > 0, "n should be greater than zero");
        require(balanceOf(msg.sender) >= n, "sender's balance is not enough");

        // Check if the balance is divisible by n
        if (balanceOf(msg.sender) % n == 0) {
            // Mint 1 token
            _mint(msg.sender, 1);
            emit Transfer(address(0), msg.sender, 1);
        }
    }

4. 调用铸币函数

MyToken token = new MyToken("My Token", "MT", 18);

token.mintOnNthLike(10); // 铸造ERC-token，每10个相似数字一个

上述代码将在每个账户的第N个相似数字上铸造1个ERC-token。该铸造功能在所有Solidity合约中都适用。