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.

A108557 Row sums of triangle A108556, in which row n equals the inverse binomial transform of the crystal ball sequence for D_n lattice.

Table of values

n a(n)
0 1
1 3
2 9
3 63
4 433
5 2823
6 17657
7 107439
8 642529
9 3802167
10 22357097
11 130970271
12 765564049
13 4469342439
14 26073165401
15 152043343119
16 886424978881
17 5167271805207
18 30119654732489
19 175558462395135
20 1023255914549617

List of values

[1, 3, 9, 63, 433, 2823, 17657, 107439, 642529, 3802167, 22357097, 130970271, 765564049, 4469342439, 26073165401, 152043343119, 886424978881, 5167271805207, 30119654732489, 175558462395135, 1023255914549617]

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

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