124639

Appears in sequences

• Composite n such that both n and its reversal in base 10 are squarefree, none of the prime factors of n are palindromes and the prime factors of the reversal of n are the reversals of those of n.at n=19A083526
• Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,0 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155279