291328
domain: N
Appears in sequences
- a(2n) = a(2n-1) + 2a(2n-2), a(2n+1) = a(2n) + a(2n-1), with a(1) = 2 and a(2) = 3.at n=20A001882
- a(n)=8*a(n-1)+72*a(n-2) for n>=3, a(0)=1, a(1)=8, a(2)=128 .at n=5A133680
- a(n) = ((4+sqrt(2))*(2+sqrt(2))^n + (4-sqrt(2))*(2-sqrt(2))^n)/4.at n=10A161941
- Starts of runs of 3 consecutive lazy-Pell-Niven numbers (A352342).at n=23A352344