248750

Appears in sequences

• a(1) = 0; a(n) = smallest of three consecutive numbers all with 2n divisors.at n=9A075040
• Solutions a(n) of (a(n)-5)*(a(n)-6) = 21*b(n)*(b(n)-1).at n=10A180509
• Number of n step walks (each step +-1 starting from 0) which are never more than 4 or less than -4.at n=19A216212
• Expansion of (1+x)*(1+2*x)*(1-x)/(1-5*x^2+5*x^4).at n=19A217777