54018520
domain: N
Appears in sequences
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 2.at n=36A001610
- Partial sums of squares of Lucas numbers.at n=17A005970
- Number of (marked) cyclic n-bit binary strings containing no runs of length > 2.at n=36A007040
- Inflation orbit counts.at n=36A031367
- a(n) = Lucas(4n+1) - 1, or 5*Fibonacci(2n)*Fibonacci(2n+1).at n=9A081017
- a(n) = Lucas(n) + (-1)^n.at n=37A099925
- a(n) = A014217(n+1) - A115360(n+2).at n=35A142584
- Row sums of triangle defined in A096539.at n=11A160909
- Position of first occurrence of n in A182576.at n=35A182580
- a(n) = phi(Lucas(n)).at n=37A197218
- Expansion of x*(1 + 2*x)/((1 - x)*(1 + x)*(1 - x - x^2)).at n=36A301653
- Number of nonempty subsets of {1, ..., n} containing no two cyclically successive elements.at n=37A324015
- Define f(x) = abs(1-1/x) and sequence {b(m)} such that b(m+1) = f(b(m)). a(n) is the number of initial values b(1) such that {b(m)}'s period has length n.at n=36A378853