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.

A194442 Number of toothpicks and D-toothpicks after n-th stage in the D-toothpick "narrow" triangle of the second kind.

Table of values

n a(n)
0 0
1 1
2 3
3 7
4 11
5 15
6 19
7 26
8 34
9 38
10 42
11 50
12 62
13 70
14 78
15 91
16 107
17 111
18 115
19 123
20 135
21 151
22 167
23 187
24 211
25 223
26 231
27 247
28 275
29 291
30 307
31 332
32 364
33 368
34 372
35 380
36 392
37 408
38 424
39 446
40 478
41 504
42 524
43 548
44 588
45 620
46 660
47 693
48 741
49 761
50 769
51 785
52 813
53 853
54 897
55 947

List of values

[0, 1, 3, 7, 11, 15, 19, 26, 34, 38, 42, 50, 62, 70, 78, 91, 107, 111, 115, 123, 135, 151, 167, 187, 211, 223, 231, 247, 275, 291, 307, 332, 364, 368, 372, 380, 392, 408, 424, 446, 478, 504, 524, 548, 588, 620, 660, 693, 741, 761, 769, 785, 813, 853, 897, 947]

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

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