a(n)/4^n is the expected number of tosses of a coin required to obtain n+1 heads or n+1 tails.
A033504
a(n)/4^n is the expected number of tosses of a coin required to obtain n+1 heads or n+1 tails.
Terms
- a(0) =1a(1) =10a(2) =66a(3) =372a(4) =1930a(5) =9516a(6) =45332a(7) =210664a(8) =960858a(9) =4319100a(10) =19188796a(11) =84438360a(12) =368603716a(13) =1598231992a(14) =6889682280a(15) =29551095248a(16) =126193235194a(17) =536799072924
External references
- oeis: A033504