148 (number)

148 1, 2, 4, 37, 74, 148 148 (one hundred [and] forty-eight) is the natural number following 147 and before 149. In mathematics 148 is the second number to be both a heptagonal number and a centered heptagonal number (the first is 1).A128919 Numbers simultaneously heptagonal and centered heptagonal It is the twelfth member of the Mian–Chowla sequence, the lexicographically smallest sequence of distinct positive integers with distinct pairwise sums.A005282 Mian-Chowla sequence There are 148 perfect graphs with six vertices,A052431 Number of perfect simple undirected graphs on n nodes and 148 ways of partitioning four people into subsets, ordering the subsets, and selecting a leader for each subset.A006153 E.g.f.: 1/(1-x*exp(x)) In other fields 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, Dunbar R. I. M. Schmitt Alain Atzwanger Klaus Grammer Karl Schäfer Katrin Groups, Gossip, and the Evolution of Language 10.1007/978-0-585-34289-4_5 77–89 Kluwer Academic Publishers New Aspects of Human Ethology 1997 978-0-306-45695-4 but this is commonly rounded to 150. References 1 Category:Integers