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.

A261135 Decimal value a(n) of the binary number b(n) obtained by starting from n, sequentially concatenating all binary numbers down to 1 and then sequentially concatenating all binary numbers from 2 up to n.

Table of values

n a(n)
1 1
2 22
3 475
4 20188
5 1472229
6 112441134
7 8415721847
8 1234163177336
9 336405959636873
10 95454487901599898
11 26891544907776231851
12 7513814442828887530172
13 2084725487959034609380301
14 574954374994698424018451678
15 157752074714160807772190133743
16 86177704805459827544499089423856

List of values

[1, 22, 475, 20188, 1472229, 112441134, 8415721847, 1234163177336, 336405959636873, 95454487901599898, 26891544907776231851, 7513814442828887530172, 2084725487959034609380301, 574954374994698424018451678, 157752074714160807772190133743, 86177704805459827544499089423856]

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

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