174764
domain: N
Appears in sequences
- Number of distinct quadratic residues mod 2^n.at n=20A023105
- Sum of squares of the first n primes.at n=32A024450
- Number of distinct quadratic residues mod 4^n.at n=10A039301
- Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=18A052953
- Consider the line segment in R^n from the origin to the point v=(2,3,5,7,11,...) with prime coordinates; let d = squared distance to this line from the closest point of Z^n (excluding the endpoints). Sequence gives d times v.v.at n=32A059804
- Sequence A075166 interpreted as binary numbers and converted to decimal.at n=37A075165
- a(n) = -a(n-1) + 2*a(n-2), a(0)=1, a(1)=2.at n=19A084247
- Numbers n such that n*(n+1)/2 is the juxtaposition of two identical strings in binary representation.at n=44A092739
- Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=18A097073
- Numbers n such that A003313(3n) < A003313(n).at n=28A104699
- Numbers k such that A003313(k) = A003313(6*k).at n=28A116461
- Jacobsthal numbers(A001045) + 1.at n=19A128209
- Second differences of A130624.at n=17A130626
- a(n+3) = 3*(a(n+2) - a(n+1)) + 2*a(n).at n=19A130707
- a(n) = 3a(n-1) - 3a(n-2) + 2a(n-3), a(0) = 3, a(1) = 2, a(2) = 0.at n=19A131370
- Row sums of triangle A135230.at n=18A135231
- Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=18A140505
- First differences of A133730.at n=38A141416
- Jacobsthal numbers A001045, every second term incremented by 1.at n=19A155944
- a(n) = 2*(1+(-1)^n)/3 + 2*A010892(n-1).at n=19A191370