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.

A191296 Least k such that k-1 and k+1 in binary representation have same number n of 0's as 1's.

Table of values

n a(n)
2 11
3 36
4 140
5 540
6 2108
7 8316
8 33020
9 131580
10 525308
11 2099196
12 8392700
13 33562620
14 134234108
15 536903676
16 2147549180
17 8590065660
18 34360000508
19 137439477756
20 549756862460
21 2199025352700
22 8796097216508
23 35184380477436
24 140737505132540
25 562949986975740
26 2251799880794108
27 9007199388958716
28 36028797287399420

List of values

[11, 36, 140, 540, 2108, 8316, 33020, 131580, 525308, 2099196, 8392700, 33562620, 134234108, 536903676, 2147549180, 8590065660, 34360000508, 137439477756, 549756862460, 2199025352700, 8796097216508, 35184380477436, 140737505132540, 562949986975740, 2251799880794108, 9007199388958716, 36028797287399420]

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

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