A230304 a(n) = 10^((10^n-1)/9 + n) + 1.

101, 10000000000001, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001

Offset

1,1

Comments

Makowski observes that A230093(a(n)) >= 2 for all n >= 1.

References

Makowski, Andrzej. On Kaprekar's "junction numbers''. Math. Student 34 1966 77 (1967). MR0223292 (36 #6340)

Links

Table of n, a(n) for n=1..3.

Index entries for Colombian or self numbers and related sequences

Formula

a(n) = 10^A110369(n) + 1. - Paolo Xausa, Jan 24 2026

Mathematica

A230304[n_] := 10^((10^n - 1)/9 + n) + 1; Array[A230304, 3] (* Paolo Xausa, Jan 24 2026 *)

Crossrefs

Cf. A006064, A110369, A230093, A230094, A230100.

Sequence in context: A262627 A259199 A006064 * A015164 A325776 A325775

Adjacent sequences: A230301 A230302 A230303 * A230305 A230306 A230307

Keyword

nonn,base

Author

N. J. A. Sloane, Oct 26 2013

Status

approved