%I #3 Mar 31 2012 10:29:01

%S 0,0,1,2,8,11,14,15,20

%N Probability P(n) of the occurrence of a 3-dimensional self-trapping walk of length n: exponent of 2 in the denominator.

%D See under A077818

%F P(n) = A077818(n) / ( 5^(n-1) * 3^A077819(n) * 2^A077820(n) )

%e See under A077818

%Y Cf. A077818, A077819.

%K frac,more,nonn

%O 11,4

%A _Hugo Pfoertner_, Nov 17 2002