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.

A118128 Numbers n such that the sum of the first n odd composites is palindromic in base 2.

Table of values

n a(n)
1 1
2 3
3 7
4 19
5 137
6 139
7 155
8 379
9 1509
10 4877
11 9509
12 13015
13 44819
14 75595
15 245027
16 804463
17 1082053
18 1154293
19 5802669
20 10186839
21 52333761
22 81509017
23 130656729
24 375417331
25 476594459
26 1955429145
27 9051994251
28 12788782787

List of values

[1, 3, 7, 19, 137, 139, 155, 379, 1509, 4877, 9509, 13015, 44819, 75595, 245027, 804463, 1082053, 1154293, 5802669, 10186839, 52333761, 81509017, 130656729, 375417331, 476594459, 1955429145, 9051994251, 12788782787]

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

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