A151720 Number of two-dimensional three-sided prudent 2n-step returns.

0, 24, 240, 2544, 31800, 435864, 6323352, 95647104, 1493934516, 23934001600, 391427518152, 6511949001648

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Timothy M. Garoni, Anthony J. Guttmann, Iwan Jensen, John C. Dethridge, Prudent walks and polygons, J. Phys. A: Math. Theor. 42 (2009) 095205, Table 1.

Crossrefs

Cf. A157519, A151719.

Sequence in context: A052724 A357242 A000536 * A052652 A052732 A267060

Adjacent sequences: A151717 A151718 A151719 * A151721 A151722 A151723

Keyword

nonn

Author

N. J. A. Sloane, Jun 11 2009

Status

approved