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.

A078476 Time taken to get n people from one side of a bridge to the other where (a) the only flashlight must be carried when crossing; (b) only one or two people may cross at the same time; (c) a pair crosses at the speed of the slowest member; and (d) the k-th person's speed requires k seconds to cross the bridge.

Table of values

n a(n)
1 1
2 2
3 6
4 11
5 16
6 22
7 28
8 35
9 42
10 50
11 58
12 67
13 76
14 86
15 96
16 107
17 118
18 130
19 142
20 155
21 168
22 182
23 196
24 211
25 226
26 242
27 258
28 275
29 292
30 310
31 328
32 347
33 366
34 386
35 406
36 427
37 448
38 470
39 492
40 515
41 538
42 562
43 586
44 611
45 636
46 662
47 688
48 715
49 742
50 770
51 798
52 827
53 856
54 886
55 916
56 947

List of values

[1, 2, 6, 11, 16, 22, 28, 35, 42, 50, 58, 67, 76, 86, 96, 107, 118, 130, 142, 155, 168, 182, 196, 211, 226, 242, 258, 275, 292, 310, 328, 347, 366, 386, 406, 427, 448, 470, 492, 515, 538, 562, 586, 611, 636, 662, 688, 715, 742, 770, 798, 827, 856, 886, 916, 947]

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

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