69972

Appears in sequences

• Numbers n such that 107*2^n-1 is prime.at n=25A050579
• a(n) is the rightmost term of M^n * [1 0 0], where M is the 3 X 3 matrix [0 1 0 / 0 0 1 / 7 -14 7].at n=6A094430
• Seventh column (m=6) of (1,6)-Pascal triangle A096956.at n=13A097297
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+16807)^2 = y^2.at n=13A118576
• Number of peaks at odd level in all Dyck paths of semilength n that have no ascents and no descents of length 1.at n=16A167636
• Number of descent sequences of length n without two consecutive identical elements (descent sequences without flat steps).at n=12A238425
• Expansion of Product_{k>=0} 1/(1-x^(3*k+1))^4.at n=23A261635
• Number of n X 3 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.at n=5A283721
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.at n=33A283726
• Number of 6Xn 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.at n=2A283731
• Ordered product of the terms in a primitive Pythagorean quadruple (with repetitions).at n=44A367737