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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.

A182137 Size of the set of b for numbers of the form 2^n*x + b that cannot be the smallest element of a set giving a duration of infinite flight in the Collatz problem.

Table of values

n a(n)
1 1
2 3
3 6
4 13
5 28
6 56
7 115
8 237
9 474
10 960
11 1920
12 3870
13 7825
14 15650
15 31473
16 63422
17 126844
18 254649
19 509298
20 1021248
21 2050541
22 4101082
23 8219801
24 16490635
25 32981270
26 66071490
27 132455435
28 264910870
29 530485275
30 1060970550
31 2123841570
32 4253619813
33 8507239626
34 17027951548
35 34095896991
36 68191793982
37 136471574881
38 272943149762
39 546144278026
40 1093108792776
41 2186217585552

List of values

[1, 3, 6, 13, 28, 56, 115, 237, 474, 960, 1920, 3870, 7825, 15650, 31473, 63422, 126844, 254649, 509298, 1021248, 2050541, 4101082, 8219801, 16490635, 32981270, 66071490, 132455435, 264910870, 530485275, 1060970550, 2123841570, 4253619813, 8507239626, 17027951548, 34095896991, 68191793982, 136471574881, 272943149762, 546144278026, 1093108792776, 2186217585552]

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

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