141422323
domain: N
Appears in sequences
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 2.at n=38A001610
- Number of restricted circular combinations.at n=37A006499
- a(n) = Lucas(4n+3) - 1, or Lucas(2n+1)*Lucas(2n+2).at n=9A081019
- a(n) = Lucas(3*n) - 1.at n=13A100233
- Odd numbers in A138123.at n=37A142248
- Continued fraction expansion for exp( Sum_{n>=1} 1/(n*A014448(n)) ), where A014448(n) = (2+sqrt(5))^n + (2-sqrt(5))^n.at n=19A174506
- Position of first occurrence of n in A182576.at n=37A182580
- a(n) = L(n)*L(n+1), where L = A000032 (Lucas numbers).at n=19A215602
- Expansion of x*(1 + 2*x)/((1 - x)*(1 + x)*(1 - x - x^2)).at n=38A301653
- Number of nonempty subsets of {1, ..., n} containing no two cyclically successive elements.at n=39A324015