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.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | -1 |
| 9 | 1 |
| 10 | 0 |
| 11 | 1 |
| 12 | -2 |
| 13 | 0 |
| 14 | -1 |
| 15 | 2 |
| 16 | -1 |
| 17 | 0 |
| 18 | 1 |
| 19 | -2 |
| 20 | 3 |
| 21 | 0 |
| 22 | -1 |
| 23 | 3 |
| 24 | -4 |
| 25 | 1 |
| 26 | 0 |
| 27 | 1 |
| 28 | -4 |
| 29 | 5 |
| 30 | -4 |
| 31 | 0 |
| 32 | -1 |
| 33 | 4 |
| 34 | -8 |
| 35 | 7 |
| 36 | -1 |
| 37 | 0 |
| 38 | 1 |
| 39 | -4 |
| 40 | 11 |
| 41 | -10 |
| 42 | 5 |
| 43 | 0 |
| 44 | -1 |
| 45 | 5 |
| 46 | -13 |
| 47 | 16 |
| 48 | -11 |
| 49 | 1 |
| 50 | 0 |
| 51 | 1 |
| 52 | -6 |
| 53 | 16 |
| 54 | -24 |
| 55 | 18 |
| 56 | -6 |
| 57 | 0 |
| 58 | -1 |
| 59 | 6 |
| 60 | -20 |
| 61 | 33 |
| 62 | -30 |
| 63 | 16 |
| 64 | -1 |
| 65 | 0 |
| 66 | 1 |
| 67 | -6 |
| 68 | 24 |
| 69 | -44 |
| 70 | 49 |
| 71 | -30 |
| 72 | 7 |
| 73 | 0 |
| 74 | -1 |
| 75 | 7 |
| 76 | -28 |
| 77 | 57 |
| 78 | -74 |
| 79 | 53 |
| 80 | -22 |
| 81 | 1 |
| 82 | 0 |
| 83 | 1 |
| 84 | -8 |
| 85 | 32 |
| 86 | -74 |
| 87 | 105 |
| 88 | -92 |
| 89 | 47 |
| 90 | -8 |
| 91 | 0 |
| 92 | -1 |
| 93 | 8 |
| 94 | -37 |
| 95 | 94 |
| 96 | -145 |
| 97 | 149 |
| 98 | -89 |
| 99 | 29 |
| 100 | -1 |
| 101 | 0 |
| 102 | 1 |
| 103 | -8 |
| 104 | 43 |
| 105 | -114 |
| 106 | 200 |
| 107 | -226 |
| 108 | 163 |
| 109 | -70 |
| 110 | 9 |
| 111 | 0 |
| 112 | -1 |
| 113 | 9 |
| 114 | -48 |
| 115 | 138 |
| 116 | -268 |
| 117 | 332 |
| 118 | -281 |
| 119 | 143 |
| 120 | -37 |
| 121 | 1 |
| 122 | 0 |
| 123 | 1 |
| 124 | -10 |
| 125 | 53 |
| 126 | -168 |
| 127 | 346 |
| 128 | -480 |
| 129 | 454 |
| 130 | -276 |
| 131 | 100 |
| 132 | -10 |
| 133 | 0 |
| 134 | -1 |
| 135 | 10 |
| 136 | -60 |
| 137 | 200 |
| 138 | -442 |
| 139 | 675 |
| 140 | -704 |
| 141 | 503 |
| 142 | -221 |
| 143 | 46 |
| 144 | -1 |
| 145 | 0 |
| 146 | 1 |
| 147 | -10 |
| 148 | 67 |
| 149 | -234 |
| 150 | 561 |
| 151 | -922 |
| 152 | 1064 |
| 153 | -860 |
| 154 | 450 |
| 155 | -138 |
| 156 | 11 |
| 157 | 0 |
| 158 | -1 |
| 159 | 11 |
| 160 | -73 |
| 161 | 273 |
| 162 | -701 |
| 163 | 1236 |
| 164 | -1567 |
| 165 | 1402 |
| 166 | -863 |
| 167 | 330 |
| 168 | -56 |
| 169 | 1 |
| 170 | 0 |
| 171 | 1 |
| 172 | -12 |
| 173 | 80 |
| 174 | -318 |
| 175 | 861 |
| 176 | -1634 |
| 177 | 2246 |
| 178 | -2214 |
| 179 | 1554 |
| 180 | -710 |
| 181 | 185 |
| 182 | -12 |
| 183 | 0 |
| 184 | -1 |
| 185 | 12 |
| 186 | -88 |
| 187 | 367 |
| 188 | -1047 |
| 189 | 2130 |
| 190 | -3144 |
| 191 | 3403 |
| 192 | -2657 |
| 193 | 1429 |
| 194 | -478 |
| 195 | 67 |
| 196 | -1 |
| 197 | 0 |
| 198 | 1 |
| 199 | -12 |
| 200 | 96 |
| 201 | -418 |
| 202 | 1268 |
| 203 | -2732 |
| 204 | 4325 |
| 205 | -5088 |
| 206 | 4378 |
| 207 | -2700 |
| 208 | 1088 |
| 209 | -242 |
| 210 | 13 |