A369092 Numbers which are a substring of their own "Look and Say" description (cf. A045918).

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 31, 41, 51, 61, 71, 81, 91, 101, 110, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 131, 141, 151, 161, 171, 181, 191, 221, 322, 422, 522, 622, 722, 822, 922, 1022, 1101, 1121, 1131, 1141, 1151, 1161, 1171, 1181, 1191

Offset

1,2

Comments

It is likely the 171 terms of the attached bfile, with a(171) = 22119221, forms the complete list of such numbers, although this is unknown.

Links

Scott R. Shannon, Table of n, a(n) for n = 1..171

Example

1 is a term as A045918(1) = 10, which contains "1" as a substring.
101 is a term as A045918(101) = 111011, which contains "101" as a substring.
22119221 is a term as A045918(22119221) = 2221192211, which contains "22119221" as a substring. It is likely this is the last possible term.

Crossrefs

Cf. A369132 (description is a substring of the number), A005150, A045918.

Sequence in context: A179308 A247806 A333501 * A247801 A004775 A231238

Adjacent sequences: A369089 A369090 A369091 * A369093 A369094 A369095

Keyword

nonn,base

Author

Scott R. Shannon, Jan 13 2024

Status

approved