A077820 a(n) is the exponent of 2 in the denominator of the probability P(n) of the occurrence of a 3-dimensional self-trapping walk of length n.

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

Offset: 11

Author

Hugo Pfoertner, Nov 17 2002

Keywords

• nonn
• frac
• more

Examples

			See under A077818.
		

References

• See under A077818.

Crossrefs

Cf. A077818, A077819, A377161, A377162, A378903.

Formula

P(n) = A077818(n) / ( 5^(n-1) * 3^A077819(n) * 2^a(n) ).