What is the formula of mahjong?

Basic Hu card type: M*AAA+N*ABC+DD (AAA is three characters, ABC is a straight, DD is a general card). There are 14 mahjong tiles, with m and n coefficients, AAA stands for the same three, and ABC stands for three consecutive tiles.

DD stands for two identical ones. So there is a way to combine cards, when m=0, n=4 plus DD, or m= 1, n=3 plus DD, or m=2, n=2 plus DD, or m=3, n= 1 plus DD.

Mahjong is a four-player domino game, which is very popular in China cultural circles. Originated in China, Guangdong, Hong Kong, Macao and southern Fujian, commonly known as sparrows, games and entertainment equipment were invented by ancient people in China. Generally speaking, they are long squares made of bamboo, bone or plastic, with patterns or words engraved on them.

Each deck of northern mahjong 136 cards. South Mahjong is generally 144, with eight cards in spring, summer, autumn and winter, and plum, bamboo, orchid and chrysanthemum. In some places, there are mahjong, plus 1 card of cornucopia, god of wealth, mouse and cat, and 4 cards of playing wild, totaling 152 cards.