Number of n step walks (each step +/-1 starting from 0) which are never more than 3 or less than -3.
A068912
Number of n step walks (each step +/-1 starting from 0) which are never more than 3 or less than -3.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =14a(5) =28a(6) =48a(7) =96a(8) =164a(9) =328a(10) =560a(11) =1120a(12) =1912a(13) =3824a(14) =6528a(15) =13056a(16) =22288a(17) =44576a(18) =76096a(19) =152192a(20) =259808a(21) =519616a(22) =887040a(23) =1774080a(24) =3028544a(25) =6057088a(26) =10340096a(27) =20680192a(28) =35303296a(29) =70606592
External references
- oeis: A068912