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.

A221965 Number of -6..6 arrays of length n with the sum ahead of each element differing from the sum following that element by 6 or less.

Table of values

n a(n)
1 13
2 169
3 1105
4 9633
5 78273
6 653185
7 5407233
8 44890625
9 372332545
10 3089205249
11 25628045313
12 212618141697
13 1763923329025
14 14633929146369
15 121406394466305
16 1007215475032065
17 8356090693812225
18 69324049716609025
19 575128245018558465

List of values

[13, 169, 1105, 9633, 78273, 653185, 5407233, 44890625, 372332545, 3089205249, 25628045313, 212618141697, 1763923329025, 14633929146369, 121406394466305, 1007215475032065, 8356090693812225, 69324049716609025, 575128245018558465]

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

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