148 (number)

148 is the second number to be both a heptagonal number and a centered heptagonal number (the first is 1).^[1] It is the twelfth member of the Mian–Chowla sequence, the lexicographically smallest sequence of distinct positive integers with distinct pairwise sums.^[2]

There are 148 perfect graphs with six vertices,^[3] and 148 ways of partitioning four people into subsets, ordering the subsets, and selecting a leader for each subset.^[4]

Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable interpersonal relationships. Dunbar predicted a "mean group size" of 148,^[5] but this is commonly rounded to 150.