A300150 "Erase or triple": list of the successive integers that produce the next "altitude" record (see the comments section).

1, 10, 23, 176, 1760, 2183, 2640, 23976, 24056, 26784, 29087, 29701, 30715, 31456, 32145, 46250, 47521, 51280, 52910, 53280, 58460, 73268, 92130, 92768, 283067, 290867, 301452, 307261, 315460, 317460, 321460, 324056, 324187, 341298, 1029857, 1035298, 1056943, 1805976, 1980726, 2197806, 2309571, 2381954

Offset

1,2

Comments

If the "Erase or triple" protocol is applied to a(1) = 1 (see A300148), the biggest integer reached is 17010; when the same protocol is applied to a(2) = 10, we reach the "altitude" 65610; when applied to a(3) = 23, the "altitude" reached is 121743; when applied to a(4) = 176, the "altitude" reached is 1154736; etc.

The sequence is finite and has 628 terms, with a(628) = 3291768054 (pandigital); a(628) reaches the maximum possible "altitude" 29625912486.

Links

Jean-Marc Falcoz, Table of n, a(n) for n = 1..628

Crossrefs

Cf. A300148, A300149.

Sequence in context: A219383 A250188 A177126 * A187621 A231880 A102089

Adjacent sequences: A300147 A300148 A300149 * A300151 A300152 A300153

Keyword

nonn,base,fini

Author

Eric Angelini and Jean-Marc Falcoz, Mar 16 2018

Status

approved