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A339961 Number of Hamiltonian circuits within parallelograms of size 9 X n on the triangular lattice. 2
1, 5640, 1269684, 295671198, 93391009587, 26971800950170, 7621726574570613, 2176852129116199068, 621423541447699842468, 177129811732376379317558, 50496098726203776039975335, 14395928063309130831417237704, 4103904494029399087473676726278 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

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.

Sequence in context: A022010 A201252 A247402 * A332738 A184080 A234401

Adjacent sequences:  A339958 A339959 A339960 * A339962 A339963 A339964

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Dec 25 2020

STATUS

approved

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Last modified October 20 22:22 EDT 2021. Contains 348119 sequences. (Running on oeis4.)