90152
domain: N
Appears in sequences
- Fibonacci sequence beginning 2, 7.at n=21A022113
- f-amicable numbers where f(n) = n+1.at n=11A066505
- a(0)=2, a(1)=5, a(n+2) = a(n+1) + (-1)^n a(n).at n=42A095795
- a(0)=2, a(1)=5, a(n+2) = a(n+1) + (-1)^n a(n).at n=45A095795
- Matrix square of triangle T = A141712, where the n-th diagonal of T equals the BINOMIAL transform of the (n-1)-th diagonal of T^2.at n=31A141715
- G.f.: exp( Sum_{n>=1} A174478(n)*x^n/n ) where A174478(n) = Sum_{d|n} d*2^(n/d)*tau(d).at n=13A174477