SOME SMARANDACHE PROBLEMS
1 1 a . . .1 a b 1 a 1
1 a b c b a 1
1 a b c d c b a 1
1 a b c d e d c b a 1
1 a b c d e f e d c b a 1
. . . 1 a b c d e f g f e d c b a 1 . . .
Mladen Vassilev-Missana Krassimir Atanassov
1 a b c d e f e d c b a 1
1 a b c d e d c b a 1
1 a b c d c b a 1
1 a b c b a 1
1 a 1 b a 1. . . a 1 1
HEXIS Phoenix, 2004