21851881930
domain: N
Appears in sequences
- a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=21A006190
- Pisot sequences E(3,10), P(3,10).at n=19A020704
- a(n) = 11*a(n-1) - a(n-2) with a(1)=1, a(2) = 10.at n=10A078922
- Define a(x,y) to be 1 if x is 0 or 1 and y*a(x-1,y)-a(x-2,y) otherwise. Then the n-th term of the sequence is a(n,n).at n=11A218219