33416

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 91.at n=36A031589
• Trajectory of 3 under map n->41n+1 if n odd, n->n/2 if n even.at n=12A037118
• Numbers whose base-4 representation contains exactly four 0's and four 2's.at n=8A045061
• Number of equilateral triangles formed out of matches that can be found in a hexagonal chunk of side length n in hexagonal array of matchsticks.at n=21A045949
• Numbers k such that (5*3^k - 7)/2 is prime.at n=20A059622
• Double factorial primes; values k for which k!! + 1 is prime.at n=4A080778
• Triangle read by rows: T(n,k) is the number of Motzkin paths of length n having k UDH's starting at level 0 (U=(1,1),H=(1,0),D=(1,-1)).at n=35A114581
• Number of Motzkin paths of length n having no UDH's starting at level 0 (U=(1,1), H=(1,0), D=(1,-1)).at n=13A114582
• Number of subsets of {1,2,3,...,n} whose sum is a cube.at n=20A126111
• Number of (n+1) X (n+1) 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.at n=1A208484
• Number of (n+1) X 3 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.at n=1A208486
• T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.at n=4A208492
• Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally.at n=7A253466
• Indices where prime(n) first appears in A373902.at n=43A371618
• G.f. A(x) satisfies 1 + 3*A(x) = Sum_{n=-oo..+oo} (x + A(x)^n)^n.at n=10A378583