2,1

R. H. Hardin, Table of n, a(n) for n=2..22

One solution for n=19

...1.2.2.2.2.2....................................

.....2.2.2.2.2.2..................................

.......2.2.2.2.2.2................................

.........2.2.2.2.2.2..............................

...........2.2.2.2.2.2............................

.............2.2.2.2.2.2..........................

...............2.2.2.2.2.2........................

.................2.2.2.2.2.2......................

...................2.2.2.2.2.3....................

.....................2.2.2.3.3.3..................

.......................2.3.3.3.3.3................

.........................3.3.3.3.4.4..............

...........................3.3.3.3.4.4............

.............................3.3.3.3.4.4..........

...............................3.3.3.3.4.4........

.................................3.3.3.3.4.4......

...................................3.3.3.3.4.4....

.....................................3.3.3.3.4.4..

.......................................3.3.3.3.4.4

Sequence in context: A165383 A006687 A060893 this_sequence A007205 A008349 A094732

Adjacent sequences: A165372 A165373 A165374 this_sequence A165376 A165377 A165378

nonn

Ron Hardin (rhhardin(AT)att.net) Sep 17 2009