|
|
A081355
|
|
Levenshtein distance between n and n^2 in decimal representation.
|
|
6
|
|
|
0, 0, 1, 1, 2, 1, 1, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 2, 3, 1, 2, 2, 2, 3, 2, 2, 3, 4, 4, 3, 3, 3, 4, 4, 3, 3, 4, 3, 4, 3, 3, 4, 4, 3, 2, 3, 4, 4, 4, 3, 3, 4, 4, 4, 2, 3, 4, 3, 4, 3, 3, 4, 3, 3, 3, 3, 4, 3, 3, 3, 2, 4, 3, 4, 3, 3, 3, 3, 4, 3, 3, 4, 4, 3, 3, 3, 4, 4, 4, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,5
|
|
LINKS
|
|
|
MATHEMATICA
|
levenshtein[s_List, t_List] := Module[{d, n = Length@s, m = Length@t}, Which[s === t, 0, n == 0, m, m == 0, n, s != t, d = Table[0, {m + 1}, {n + 1}]; d[[1, Range[n + 1]]] = Range[0, n]; d[[Range[m + 1], 1]] = Range[0, m]; Do[ d[[j + 1, i + 1]] = Min[d[[j, i + 1]] + 1, d[[j + 1, i]] + 1, d[[j, i]] + If[ s[[i]] === t[[j]], 0, 1]], {j, m}, {i, n}]; d[[ -1, -1]] ]];
f[n_] := levenshtein[IntegerDigits[n], IntegerDigits[n^2]]; Table[f[n], {n, 0, 104}] (* Robert G. Wilson v, Jan 25 2006 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|