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.

A260853 Base-3 representation of a(n) is the concatenation of the base-3 representations of 1, 2, ..., n, n-1, ..., 1.

Table of values

n a(n)
0 0
1 1
2 16
3 439
4 35350
5 2864599
6 232046890
7 18795930559
8 1522471570630
9 369960528437035
10 269701223137448146
11 196612191672080116867
12 143330287729139571972130
13 104487779754548024866115515
14 76171591441065652665051372946
15 55529090160536864641400481743827

List of values

[0, 1, 16, 439, 35350, 2864599, 232046890, 18795930559, 1522471570630, 369960528437035, 269701223137448146, 196612191672080116867, 143330287729139571972130, 104487779754548024866115515, 76171591441065652665051372946, 55529090160536864641400481743827]

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

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