A338255 a(n) = smallest m such that A328330(m) = n, or -1 if n never appears in A328330.

4, 2, 1, 8, 10, 22, 1088

Offset

1,1

Comments

a(8) = 2008...888 (156 digits).

Links

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

Index entries for sequences related to calculator display

Example

4 is represented with 4 segments, so a(1) = 4.
2 is represented by 5 segments, 5 is represented by 5 segments so a(2) = 2.
1 is represented by 2 segments, 2 is by 5, 5 by 5 again, so a(3) = 1.
[...]
1088 is the solution for 7 steps.
2008..888 (156 digits) is the solution for 8 steps.

Crossrefs

Cf. A006942.

Location of first occurrence of n in A328330.

Sequence in context: A135294 A175938 A117016 * A013659 A016505 A304254

Adjacent sequences: A338252 A338253 A338254 * A338256 A338257 A338258

Keyword

base,nonn

Author

Jens Placke, Oct 18 2020

Status

approved