20144

Appears in sequences

• Numbers n whose sum of divisors and number of divisors are both triangular numbers.at n=39A070996
• Expansion of -x^2/(136*x^2+2*x-1).at n=5A140898
• a(n) = T(9,n), array T given by A048505.at n=7A195855
• Number of partitions of n where the difference between consecutive parts is at most 4.at n=41A238864
• Expansion of (1-5*x+6*x^2-x^3)/((1-x)*(1-2*x)*(1-3*x)*(1-4*x)).at n=7A246986
• Number of length 6+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.at n=16A248439