[seqfan] Re: seqs whose |differences| are 1,2,3,4,...

[Ron Hardin]

Shortest such seqence starting with 1 containing all the values 1..80 without repeats

values 1..80 length=153 : 1 2 4 7 3 8 14 21 13 22 12 23 11 24 10 25 9 26 44 63 43 64 42 65 41 66 40 67 39 68 38 69 37 70 36 71 35 72 34 73 33 74 32 75 31 76 30 77 29 78 28 79 27 80 134 189 245 302 244 185 125 186 248 311 247 182 116 49 117 48 118 47 119 46 120 45 121 198 276 197 277 358 440 357 441 356 270 183 95 6 96 5 97 190 284 379 283 380 282 381 481 582 480 377 273 168 62 169 61 170 60 171 59 172 58 173 57 174 56 175 55 176 54 177 53 178 52 179 51 180 50 181 313 446 580 715 579 442 304 443 303 162 20 163 19 164 18 165 17 166 16 167 15

It's unusually efficient, so maybe has some useful structure.

 rhhardin at mindspring.com
rhhardin at att.net (either)