cp's OEIS Frontend

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.

A129873 Sequence s_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

Table of values

n a(n)
1 2
2 3
3 8
4 13
5 38
6 64
7 196
8 337
9 1062
10 1851
11 5948
12 10468
13 34120
14 60488
15 199316
16 355369
17 1181126
18 2115577
19 7080928
20 12731141
21 42860534
22 77306428
23 261542752
24 473018396
25 1607076200
26 2913321828
27 9934255472
28 18045744424
29 61732449648
30 112340143632

List of values

[2, 3, 8, 13, 38, 64, 196, 337, 1062, 1851, 5948, 10468, 34120, 60488, 199316, 355369, 1181126, 2115577, 7080928, 12731141, 42860534, 77306428, 261542752, 473018396, 1607076200, 2913321828, 9934255472, 18045744424, 61732449648, 112340143632]

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

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