Number of n step walks (each step +/- 1 starting from 0) which are never more than 6 or less than -6.

A235701

Number of n step walks (each step +/- 1 starting from 0) which are never more than 6 or less than -6.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =126a(8) =252a(9) =490a(10) =980a(11) =1890a(12) =3780a(13) =7252a(14) =14504a(15) =27734a(16) =55468a(17) =105840a(18) =211680a(19) =403368a(20) =806736a(21) =1535954a(22) =3071908a(23) =5845406a(24) =11690812a(25) =22238062a(26) =44476124a(27) =84582428a(28) =169164856a(29) =321661970

External references