1887436

Appears in sequences

• a(n) = A080313(n)/2.at n=23A080315
• a(n) = 4 * floor(9*2^n/5).at n=18A102653
• Number of n-digit numbers that are divisible by 5^n.at n=20A151754
• a(n) = a(n-2) + 4*a(n-3) - 4*a(n-5), where a(0) = 1, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 19, a(5) = 28.at n=29A297554