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.

A350370 a(n) is the smallest k such that the Collatz sequence for k includes a record number of consecutive tripling steps.

Table of values

n a(n)
1 1
2 3
3 7
4 15
5 27
6 127
7 255
8 511
9 1023
10 1819
11 4095
12 4255
13 16383
14 32767
15 65535
16 77671
17 262143
18 459759
19 1048575
20 2097151
21 4194303
22 7456539
23 16777215
24 33554431
25 67108863
26 125687199
27 1073741823
28 2147483647
29 4294967295
30 8589934591
31 17179869183
32 20361326439
33 68719476735

List of values

[1, 3, 7, 15, 27, 127, 255, 511, 1023, 1819, 4095, 4255, 16383, 32767, 65535, 77671, 262143, 459759, 1048575, 2097151, 4194303, 7456539, 16777215, 33554431, 67108863, 125687199, 1073741823, 2147483647, 4294967295, 8589934591, 17179869183, 20361326439, 68719476735]

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

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