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.

A258973 The number of plain lambda terms presented by de Bruijn indices, see Bendkowski et al., where zeros have no weight.

Table of values

n a(n)
0 1
1 3
2 10
3 40
4 181
5 884
6 4539
7 24142
8 131821
9 734577
10 4160626
11 23881695
12 138610418
13 812104884
14 4796598619
15 28529555072
16 170733683579
17 1027293807083
18 6211002743144
19 37713907549066
20 229894166951757
21 1406310771154682
22 8630254073158599
23 53117142215866687
24 327800429456036588

List of values

[1, 3, 10, 40, 181, 884, 4539, 24142, 131821, 734577, 4160626, 23881695, 138610418, 812104884, 4796598619, 28529555072, 170733683579, 1027293807083, 6211002743144, 37713907549066, 229894166951757, 1406310771154682, 8630254073158599, 53117142215866687, 327800429456036588]

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

Content is available under The OEIS End-User License Agreement.