A259816 Total length of self-avoiding walks with n bonds on the square lattice with additional bridges of length 2.

4, 12, 64, 160, 676, 1732, 6440, 16688, 57620, 150580, 494776, 1301208, 4126100, 10903692, 33663256, 89287024, 269997636, 718153380, 2136075840, 5693969456, 16710504036, 44618212196

Offset

1,1

Links

Table of n, a(n) for n=1..22.

A. J. Guttmann and Y. S. Yang, The shortest path of SAWs with bridges, Journal of Physics A: Mathematical and General 24.7 (1991): 1603-1609.

Crossrefs

Sequence in context: A188328 A291772 A222645 * A353452 A071769 A221667

Adjacent sequences: A259813 A259814 A259815 * A259817 A259818 A259819

Keyword

nonn

Author

N. J. A. Sloane, Jul 08 2015

Status

approved