# Computed 2017-11-03 in MIT/GNU Scheme Release 9.0.1 || Microcode 15.1 || Runtime 15.7 || Win32 1.8 || SF 4.41 || LIAR/i386 4.118 || Edwin 3.116 # # with the following Scheme-program (see also https://github.com/karttu/IntSeq ) # # (define (A003023 n) # (let loop ((visited (list n)) (i 0)) # (let ((next (A001065 (car visited)))) # (cond ((zero? next) i) # ((member next visited) (+ 1 i)) # (else (loop (cons next visited) (+ 1 i))) # ) # ) # ) # ) # # (define (A001065 n) (- (A000203 n) n)) # # With A000203 implemented as under Program-section of https://oeis.org/A000203 # 1 0 2 1 3 1 4 2 5 1 6 1 7 1 8 2 9 3 10 3 11 1 12 6 13 1 14 4 15 4 16 5 17 1 18 3 19 1 20 6 21 2 22 5 23 1 24 4 25 2 26 6 27 2 28 1 29 1 30 14 31 1 32 2 33 5 34 7 35 2 36 3 37 1 38 6 39 2 40 3 41 1 42 13 43 1 44 4 45 6 46 7 47 1 48 5 49 3 50 2 51 3 52 8 53 1 54 12 55 2 56 4 57 2 58 3 59 1 60 10 61 1 62 8 63 2 64 3 65 2 66 11 67 1 68 4 69 3 70 5 71 1 72 8 73 1 74 4 75 4 76 4 77 2 78 10 79 1 80 6 81 4 82 5 83 1 84 5 85 2 86 8 87 6 88 6 89 1 90 9 91 3 92 5 93 3 94 3 95 3 96 8 97 1 98 2 99 3 100 4 101 1 102 17 103 1 104 6 105 7 106 5 107 1 108 9 109 1 110 6 111 2 112 8 113 1 114 16 115 2 116 4 117 3 118 9 119 3 120 11 121 7 122 4 123 7 124 5 125 2 126 15 127 1 128 2 129 2 130 5 131 1 132 10 133 3 134 6 135 8 136 7 137 1 138 177 139 1 140 4 141 4 142 5 143 3 144 8 145 3 146 5 147 5 148 10 149 1 150 176 151 1 152 11 153 5 154 7 155 2 156 7 157 1 158 6 159 3 160 10 161 2 162 3 163 1 164 6 165 8 166 9 167 1 168 174 169 5 170 8 171 2 172 8 173 1 174 15 175 2 176 4 177 3 178 6 179 1 180 51 181 1 182 8 183 3 184 5 185 2 186 14 187 2 188 11 189 2 190 9 191 1 192 12 193 1 194 5 195 5 196 3 197 1 198 13 199 1 200 3 201 2 202 7 203 2 204 9 205 2 206 6 207 8 208 6 209 2 210 51 211 1 212 10 213 5 214 7 215 4 216 9 217 3 218 9 219 3 220 2 221 2 222 175 223 1 224 16 225 7 226 5 227 1 228 7 229 1 230 8 231 6 232 10 233 1 234 174 235 2 236 6 237 2 238 6 239 1 240 10 241 1 242 2 243 8 244 10 245 2 246 14 247 6 248 11 249 7 250 10 251 1 252 16 253 3 254 6 255 4 256 5 257 1 258 13 259 7 260 10 261 3 262 7 263 1 264 30 265 2 266 8 267 4 268 7 269 1 270 12 271 1 272 11 273 3 274 5 275 2