A091091 Numbers needing in binary and ternary representation an equal minimal number of editing steps (delete, insert or substitute) to transform them into their square.

0, 1, 5, 6, 8, 11, 13, 16, 17, 18, 19, 33, 35, 38, 40, 56, 60, 74, 122, 123, 133, 143, 146, 164, 168, 173, 299, 350, 365, 429, 497, 515, 527, 564, 566, 593, 608, 611, 710, 1031, 1050, 1052, 1059, 1088, 1089, 1090, 1092, 1096, 1105, 1287, 1301, 1316, 1322

Offset

1,3

Comments

A091092(a(n)) = A091093(a(n)).

Links

Table of n, a(n) for n=1..53.

Michael Gilleland, Levenshtein Distance [It has been suggested that this algorithm gives incorrect results sometimes. - N. J. A. Sloane]

Eric Weisstein's World of Mathematics, Square Number

Eric Weisstein's World of Mathematics, Binary

Eric Weisstein's World of Mathematics, Ternary

Crossrefs

Cf. A007088, A001737, A007089, A001738, A000290.

Sequence in context: A291640 A088766 A332549 * A262161 A372397 A290744

Adjacent sequences: A091088 A091089 A091090 * A091092 A091093 A091094

Keyword

nonn,base

Author

Reinhard Zumkeller, Dec 18 2003

Status

approved