65570

Appears in sequences

• Expansion of (1-x)/(1-3x+x^2+4x^3-4x^4).at n=16A117353
• Euler's fearsome foursome.at n=3A229076
• Numbers n such that if x=sigma(n)-tau(n)-n then n=sigma(x)-tau(x)-x.at n=33A238227
• Number of nX2 0..1 arrays with every element equal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.at n=15A297937
• Numbers k for which A003973(k) is equal to 2*sigma(k).at n=25A337384