578949
domain: N
Appears in sequences
- Narayana's cows sequence: a(0) = a(1) = a(2) = 1; thereafter a(n) = a(n-1) + a(n-3).at n=36A000930
- Bisection of A000930.at n=18A002478
- Pisot sequence P(4,6).at n=31A048625
- Pisot sequence P(6,9).at n=30A048626
- Expansion of (1-x)^2/(1 - 4*x + 3*x^2 - x^3).at n=12A052544
- The (3^n)-th composite number.at n=12A065605
- Number of ways to tile a 2 X n room with 1 X 2 Tatami mats. At most 3 Tatami mats may meet at a point.at n=35A068921
- a(n) = a(n-1) + a(n-3) for n >= 3, with a(0) = 1, a(1) = a(2) = 0. This recurrence can also be used to define a(n) for n < 0.at n=39A078012
- a(n) = n-1, if n <= 2, otherwise A107458(n-1) + A107458(n-2).at n=41A135851
- G.f.: 1/(1+x+x^3).at n=36A199804
- INVERT transform of [1, 0, 1, 3, 9, 27, 81, ...].at n=13A204200
- a(n) = A000930(n^2), where A000930 is Narayana's cows sequence.at n=6A231620
- a(n) = A000930(n*(n+1)/2), where A000930 is Narayana's cows sequence.at n=8A231621
- a(n) = Sum_{k=0..2*n} binomial(2*k,2*n-k).at n=9A391594