Number of sequences of n coin flips that win on the last flip, if the sequence of flips ends with (1,1,1,1).
A199926
Number of sequences of n coin flips that win on the last flip, if the sequence of flips ends with (1,1,1,1).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =2a(7) =4a(8) =6a(9) =11a(10) =20a(11) =35a(12) =62a(13) =111a(14) =197a(15) =350a(16) =623a(17) =1108a(18) =1970a(19) =3504a(20) =6232a(21) =11083a(22) =19711a(23) =35056a(24) =62346a(25) =110881a(26) =197200a(27) =350716a(28) =623741a(29) =1109311
External references
- oeis: A199926