1789569707
domain: N
Appears in sequences
- a(n) = a(n-1) + 2*a(n-2), a(0)=2, a(1)=3.at n=30A048573
- a(n) = a(n-1) + 4*a(n-2) - 4*a(n-3) for n>3.at n=31A136336
- a(n) = 3*a(n-1) - 4*a(n-2) + 6*a(n-3) - 4*a(n-4), with initial terms 1,2,4,7.at n=31A136408
- a(n) = (5*4^n + 1)/3.at n=15A136412
- a(n) = (10*2^n + 3 - (-1)^n)/6.at n=30A171231
- Number of achiral color patterns (set partitions) in a row or cycle of length n with 4 or fewer colors (subsets).at n=32A305750
- Primes of the form (5*4^k + 1)/3.at n=5A352046