A339962 Number of Hamiltonian circuits within parallelograms of size 10 X n on the triangular lattice.

1, 18980, 8782833, 4190083085, 2848083212818, 1738936046774850, 1033232532941136255, 621423541447699842468, 373334515946952014204102, 223802065032649969887333948, 134170413630013820290109500226, 80436114451156297907062202392494, 48216986287603185632341666866663007

Offset

2,2

Links

Table of n, a(n) for n=2..14.

Olga Bodroža-Pantić, Harris Kwong and Milan Pantić, Some new characterizations of Hamiltonian cycles in triangular grid graphs, Discrete Appl. Math. 201 (2016) 1-13. (a(n) is equal to h9(n-1) defined by this paper)

M. Peto, Studies of protein designability using reduced models, Thesis, 2007.

Crossrefs

Row 10 of A339849.

Cf. A180504.

Sequence in context: A277787 A252885 A232576 * A235928 A031643 A261748

Adjacent sequences: A339959 A339960 A339961 * A339963 A339964 A339965

Keyword

nonn

Author

Seiichi Manyama, Dec 25 2020

Status

approved