A339961 Number of Hamiltonian circuits within parallelograms of size 9 X n on the triangular lattice.

1, 5640, 1269684, 295671198, 93391009587, 26971800950170, 7621726574570613, 2176852129116199068, 621423541447699842468, 177129811732376379317558, 50496098726203776039975335, 14395928063309130831417237704, 4103904494029399087473676726278

Offset: 2

Author

Seiichi Manyama, Dec 25 2020

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 2..50
• 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 h8(n-1) defined by this paper)
• M. Peto, Studies of protein designability using reduced models, Thesis, 2007.

Crossrefs

Row 9 of A339849.

Cf. A160149.