Number of (s(0), s(1), ..., s(n)) such that 0 < s(i) < 6 and |s(i) - s(i-1)| <= 1 for i = 1,2,...,n, s(0) = 2, s(n) = 4.
A094306
Number of (s(0), s(1), ..., s(n)) such that 0 < s(i) < 6 and |s(i) - s(i-1)| <= 1 for i = 1,2,...,n, s(0) = 2, s(n) = 4.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =30a(4) =88a(5) =252a(6) =712a(7) =1992a(8) =5536a(9) =15312a(10) =42208a(11) =116064a(12) =318592a(13) =873408a(14) =2392192a(15) =6547584a(16) =17912320a(17) =48985344a(18) =133926400a(19) =366085632a(20) =1000548352a(21) =2734316544a(22) =7471826944a(23) =20416481280a(24) =55785005056a(25) =152419749888
External references
- oeis: A094306