23188

Appears in sequences

• a(n) = floor(n*phi^15), where phi is the golden ratio, A001622.at n=17A004930
• a(n) = round(n*phi^15), where phi is the golden ratio, A001622.at n=17A004950
• Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array in A026148.at n=10A026163
• Number of partitions of n into parts not of the form 11k, 11k+5 or 11k-5. Also number of partitions with at most 4 parts of size 1 and differences between parts at distance 4 are greater than 1.at n=45A035948
• a(n) = (F(n) + F(4*n))/2, where F=A000045 (the Fibonacci sequence).at n=6A049671
• G.f. A(x) satisfies: A(x*G(x)) = G(x), where G(x) is the g.f. for A098616(n) = Pell(n+1)*Catalan(n).at n=10A098617
• Numbers such that the sum of the factorials of the digits of the fifth power is a square.at n=27A126078
• Numbers k such that k and k+17 have same sum of divisors.at n=10A172335
• Multiples of 682.at n=34A200860
• Second elementary symmetric function of the first n terms of (1,4,16,64,256,...).at n=3A203244
• Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.at n=5A221394
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.at n=30A221396
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.at n=33A221396
• Positive integers m such that pi(m^3) = pi(j^3) + pi(k^3) for some 0 < j <= k < m.at n=25A262409
• Number of quadrilaterals in the graph formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).at n=20A332607
• Symmetric difference of the primitive non-deficient numbers and the primitive Zumkeller numbers.at n=7A378538
• Numbers that are primitive Zumkeller, but not primitive non-deficient.at n=4A378657
• a(n) = [x^n] sqrt(1 - 4*x)/(1 - 8*x). Row sums of A380865.at n=5A380864