31509019101
domain: N
Appears in sequences
- a(n) = floor( a(n-1)/(sqrt(2) - 1) ), with a(0) = 1.at n=28A024537
- Consider all Pythagorean triples (X,X+1,Z) ordered by increasing Z; sequence gives X+1 values.at n=14A046090
- Related to Pythagorean triples: alternate terms of A001652 and A046090.at n=14A046727
- Expansion of (1-x)^(-1)/(1+2*x-x^2).at n=28A077921
- Pell oblongs.at n=14A084159
- Expansion of g.f. x/(1 - x - 3*x^2 - x^3).at n=29A097076
- Binomial transform of 1,0,1,0,2,0,4,0,8,0,16,...at n=29A171842
- a(n) = 6*a(n-1) - a(n-2) - 2 with n>1, a(0)=0, a(1)=1.at n=15A182435