A137097 Numbers k such that k and k^2 use only the digits 2, 4, 5, 7 and 8.

2, 5, 22, 28, 85, 88, 278, 472, 478, 522, 528, 888, 2878, 5278, 7588, 27485, 47485, 74528, 87878, 242585, 275472, 522282, 745485, 885582, 2782485, 2784878, 2878278, 8845778, 8874528, 24257485, 27545522, 27547282, 28787588, 88457588, 88725828, 242454585, 242544582, 242587878, 274745778, 275424722, 474852878, 475244722, 758585828, 885845522

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..205

Jonathan Wellons, Tables of Shared Digits [archived].

Example

524828758575828^2 = 275445225828244752454825885584.

Crossrefs

Sequence in context: A072961 A249829 A042557 * A024686 A024475 A024600

Adjacent sequences: A137094 A137095 A137096 * A137098 A137099 A137100

Keyword

base,nonn,changed

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved