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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Table of values

n a(n)
2 1
3 5640
4 1269684
5 295671198
6 93391009587
7 26971800950170
8 7621726574570613
9 2176852129116199068
10 621423541447699842468
11 177129811732376379317558
12 50496098726203776039975335
13 14395928063309130831417237704
14 4103904494029399087473676726278

List of values

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

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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