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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.

A319325 a(n) is the number of row convex polyglasses (polyiamonds which need only touch at corners) with n cells.

Table of values

n a(n)
1 2
2 10
3 52
4 276
5 1470
6 7838
7 41798
8 222902
9 1188696
10 6339088
11 33805118
12 180276062
13 961376842
14 5126833922
15 27340398612
16 145800977348
17 777527983398
18 4146404063814
19 22111958704510
20 117918733974142
21 628837454333128
22 3353466668484240
23 17883379272566534
24 95368550166928198

List of values

[2, 10, 52, 276, 1470, 7838, 41798, 222902, 1188696, 6339088, 33805118, 180276062, 961376842, 5126833922, 27340398612, 145800977348, 777527983398, 4146404063814, 22111958704510, 117918733974142, 628837454333128, 3353466668484240, 17883379272566534, 95368550166928198]

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

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