Number of people needed so that probability of at least two sharing a birthday out of n possible days is at least 50%.

A033810

Number of people needed so that probability of at least two sharing a birthday out of n possible days is at least 50%.

Terms

    a(0) =2a(1) =2a(2) =3a(3) =3a(4) =3a(5) =4a(6) =4a(7) =4a(8) =4a(9) =5a(10) =5a(11) =5a(12) =5a(13) =5a(14) =5a(15) =5a(16) =6a(17) =6a(18) =6a(19) =6a(20) =6a(21) =6a(22) =6a(23) =7a(24) =7a(25) =7a(26) =7a(27) =7a(28) =7a(29) =7

External references