A300151 "Erase or triple": list of the successive "altitude" records (see the comments section).

17010, 65610, 121743, 1154736, 1283040, 1591407, 5773680, 5826168, 5845608, 6508512, 7068141, 7217343, 7463745, 7643808, 7811235, 11238750, 11547603, 12461040, 12857130, 12947040, 14205780, 17804124, 22387590, 22542624, 22928427, 23560227, 24417612, 24888141, 25552260, 25714260, 26038260, 26248536

Offset

1,1

Comments

If the "Erase or triple" protocol is applied to 1 (see A300148), the biggest integer reached is a(1) = 17010; the next such "altitude" > 17010 is a(2) = 65610 (reached by the integer 10); then the next "altitude" > a(2) is a(3) = 121743 (reached by the integer 23), etc.

There are 628 such "altitudes" (the last and biggest one being 29625912486, reached by the integer 3291768054, a pandigital). The sequence is finite.

Links

Table of n, a(n) for n=1..32.

Crossrefs

Cf. A300148, A300149, A300150.

Sequence in context: A205437 A235978 A326808 * A205232 A265972 A265927

Adjacent sequences: A300148 A300149 A300150 * A300152 A300153 A300154

Keyword

nonn,base,fini

Author

Eric Angelini and Jean-Marc Falcoz, Mar 16 2018

Status

approved