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.

A257092 Square array read by antidiagonals: Nimsum function for "Take-or-Break" Nim where a legal move is defined as: 1) Remove a nonzero number of counters from any pile up to the size of the selected pile OR 2) Split any pile of size greater than one into two nonzero piles (removing no counters from the board).

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 0
5 2
6 3
7 4
8 4
9 3
10 4
11 5
12 0
13 5
14 4
15 5
16 2
17 6
18 6
19 2
20 5
21 6
22 3
23 1
24 0
25 1
26 3
27 6
28 7
29 8
30 8
31 8
32 8
33 8
34 8
35 7
36 8
37 9
38 3
39 1
40 0
41 1
42 3
43 9
44 8
45 9
46 6
47 10
48 2
49 6
50 6
51 2
52 10
53 6
54 9
55 10
56 7
57 5
58 11
59 5
60 0
61 5
62 11
63 5
64 7
65 10
66 11
67 12
68 12
69 4
70 12
71 4
72 4
73 12
74 4
75 12
76 12
77 11
78 12
79 13
80 7
81 13
82 3
83 13
84 0
85 13
86 3
87 13
88 7
89 13
90 12
91 13
92 10
93 14
94 14
95 10
96 2
97 14
98 14
99 2
100 10
101 14
102 14
103 10
104 13
105 14
106 11
107 9
108 7
109 9
110 11
111 1
112 0
113 1
114 11
115 9
116 7
117 9
118 11
119 14

List of values

[0, 1, 1, 2, 0, 2, 3, 4, 4, 3, 4, 5, 0, 5, 4, 5, 2, 6, 6, 2, 5, 6, 3, 1, 0, 1, 3, 6, 7, 8, 8, 8, 8, 8, 8, 7, 8, 9, 3, 1, 0, 1, 3, 9, 8, 9, 6, 10, 2, 6, 6, 2, 10, 6, 9, 10, 7, 5, 11, 5, 0, 5, 11, 5, 7, 10, 11, 12, 12, 4, 12, 4, 4, 12, 4, 12, 12, 11, 12, 13, 7, 13, 3, 13, 0, 13, 3, 13, 7, 13, 12, 13, 10, 14, 14, 10, 2, 14, 14, 2, 10, 14, 14, 10, 13, 14, 11, 9, 7, 9, 11, 1, 0, 1, 11, 9, 7, 9, 11, 14]