3,2
Table of n, a(n) for n=3..14.
Erich Friedman, Problem of the month March 2000
Wikipedia, Sokoban
Sequence in context: A057225 A220315 A070819 * A005244 A058541 A023672
Adjacent sequences: A195664 A195665 A195666 * A195668 A195669 A195670
nonn,more
Kausthub Gudipati, Sep 22 2011
approved