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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.

A292213 Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than seven.

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 5
5 12
6 33
7 90
8 260
9 763
10 2302
11 7035
12 21854
13 68581
14 217485
15 695229
16 2238965
17 7255380
18 23643501
19 77426852
20 254678757
21 841028918
22 2787320206
23 9267764857
24 30906754731
25 103350631437
26 346465277423
27 1164150100182
28 3920004155435
29 13225916804136

List of values

[0, 1, 1, 2, 5, 12, 33, 90, 260, 763, 2302, 7035, 21854, 68581, 217485, 695229, 2238965, 7255380, 23643501, 77426852, 254678757, 841028918, 2787320206, 9267764857, 30906754731, 103350631437, 346465277423, 1164150100182, 3920004155435, 13225916804136]

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

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