a(n) is the number of n-tosses having a run of 3 or more heads or a run of 3 or more tails for a fair coin (i.e., probability is a(n)/2^n).
A167821
a(n) is the number of n-tosses having a run of 3 or more heads or a run of 3 or more tails for a fair coin (i.e., probability is a(n)/2^n).
Terms
- a(0) =0a(1) =0a(2) =2a(3) =6a(4) =16a(5) =38a(6) =86a(7) =188a(8) =402a(9) =846a(10) =1760a(11) =3630a(12) =7438a(13) =15164a(14) =30794a(15) =62342a(16) =125904a(17) =253782a(18) =510758a(19) =1026684a(20) =2061730a(21) =4136990a(22) =8295872a(23) =16627166a(24) =33311646a(25) =66716028a(26) =133582106a(27) =267406998a(28) =535206832a(29) =1071049286
External references
- oeis: A167821