A080486 a(1) = 1, a(n) = smallest multiple of a(n-1) (not equal to 10^k*a(n-1)) obtained by inserting digits anywhere in a(n-1).

1, 11, 121, 12221, 6122721, 61233332721, 61233393954332721, 612333939604560603954332721

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A080487, A080488, A080489, A080490, A080491, A080492, A080493, A080494.

Sequence in context: A263608 A088760 A342233 * A082776 A216208 A110398

Adjacent sequences: A080483 A080484 A080485 * A080487 A080488 A080489

Keyword

base,nonn,more

Author

Amarnath Murthy, Mar 18 2003

Extensions

Corrected and extended by Frank Ellermann, Jul 11 2003

Entry revised by Sean A. Irvine, Sep 21 2025

a(8) from Bert Dobbelaere, Nov 09 2025

Status

approved