19436

Appears in sequences

• Sum of n-th row of triangle in A082196.at n=29A082199
• a(n) = number of Egyptian fractions 1 = 1/x_1 + ... + 1/x_k (for any k), 0<x_1<...<x_k<=n.at n=51A092670
• a(n) = number of Egyptian fractions 1 = 1/x_1 + ... + 1/x_k (for any k), 0<x_1<...<x_k<=n.at n=52A092670
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.at n=10A148202
• Number of 6 X 6 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=9A156388
• Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 9.at n=5A156448
• Bisections are {b(n)*b(n+1), n>=0} (shifted) and {b(n)^2, n>=0} where {b(n), n>=0} is the self-convolution of this sequence, with a(0)=1.at n=12A173610
• Even bisection of A173610.at n=6A173613
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >n.at n=14A210291
• Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=22A217113
• Number of ways to choose a strict rooted partition of each part in a constant rooted partition of n.at n=44A301768
• Expansion of ((1 + 4*x)/(1 - 4*x))^(1/4).at n=9A303537
• Least d > 0 such that both Q = M + 2d and R = M + (M^2-1)/(Q-M) are prime, where M = 2^n - 1 = A000225(n), or 0 if there is no such d.at n=28A320875
• Least d > 0 such that both Q = M + 2d and R = M + (M^2-1)/(Q-M) are prime, where M = 2^n - 1 = A000225(n), or 0 if there is no such d.at n=56A320875
• Numbers that are divisible by the total number of 1's in both the Zeckendorf and the dual Zeckendorf representations of all their divisors (A300837 and A333618).at n=13A333621