100704

Appears in sequences

• Number of achiral trees with n nodes.at n=23A005629
• Triangle of Gandhi polynomial coefficients.at n=18A065747
• a(0) = 1, a(1) = 2; for n > 0, a(2n) = 3a(2n-1), a(2n+1) = 3a(2n) - 2a(n-1).at n=11A129772
• 1/120 the number of n X 4 arrays of integers in 1..6 with no element or any of its neighbors having the same value.at n=4A180375
• 1/120 the number of nX5 arrays of integers in 1..6 with no element or any of its neighbors having the same value.at n=3A180376