A285987 a(n)=least number that is cyclops for exactly n distinct bases b > 1.

1, 5, 19, 51, 197, 901, 2038, 5839, 13476, 18517, 36993, 60544, 60557, 60555, 60553, 705691, 705758, 2528254, 4762881, 5645512, 5645535, 20250250, 20250249, 26733097, 66978018, 66978001, 66978016, 66978065, 66978193, 133956385, 187142781, 589907497, 1018886425

Offset

0,2

Comments

A134808 gives the definition of cyclops numbers for base 10; we can naturally generalize this notion for any base b > 1.

This sequence is not strictly increasing; for example: a(12) = 60557 > a(13) = 60555 > a(14) = 60553.

Links

Rémy Sigrist, Table of n, a(n) for n = 0..35

Rémy Sigrist, Illustration of the first terms

Rémy Sigrist, C program for A285987

Crossrefs

Cf. A134808.

Sequence in context: A100104 A015650 A200764 * A055365 A209817 A281156

Adjacent sequences: A285984 A285985 A285986 * A285988 A285989 A285990

Keyword

nonn,base

Author

Rémy Sigrist, Apr 30 2017

Status

approved