A179204 a(1)=11. For n>1, a(n) is LCM of a(n-1) and largest integer <= sqrt(a(n-1)).

11, 33, 165, 660, 3300, 62700, 313500, 175246500, 1159956583500, 104107263325708500, 33590892600867160755553500, 16223743465315689722383864179533682000, 816839289277964676046109573379123296940139985976528000

Offset: 1

Author

J. Lowell, Jul 02 2010

Keywords

• nonn

Comments

All similar sequences starting with numbers less than 11 become constant after a few terms.

Next initial values for the sequence to behave like this one: 13, 17, 19, 23, 26, 27, 28, 29, ... - Michel Marcus, Jun 14 2013

Links

• Jon E. Schoenfield, Table of n, a(n) for n = 1..20

Crossrefs

Cf. A241097.

Programs

PARI

lista(nn) = {ia = 11; print1(ia, ", "); for (i=1, nn, ib = lcm(ia, sqrtint(ia)); print1(ib, ", "); ia = ib;);} \\ Michel Marcus, Jun 14 2013

Extensions

Extended by Ray Chandler, Jul 07 2010

More terms from Jon E. Schoenfield, Jul 05 2010

b-file corrected by Jon E. Schoenfield, Apr 26 2014 after Alois P. Heinz found that the terms from a(15) onward were incorrect