25272

Appears in sequences

• Number of labeled M-type rooted trees on n nodes.at n=4A006959
• Multiples of 6 with only prime digits (2, 3, 5 and 7).at n=38A077535
• Product of prime(n+1)-1 and prime(n)-1.at n=36A083553
• First differences of A140495.at n=39A142716
• a(n+1) = a(n) + floor(a(n)/4) with a(0)=4.at n=41A182305
• Numbers with prime factorization pq^3r^5.at n=12A190011
• Molecular topological indices of the complete tripartite graphs K_{n,n,n}.at n=8A192491
• a(n) = n^3 - a(n-2) for n >= 2 and a(0)=0, a(1)=1.at n=36A215097
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.at n=11A220926
• Number of n X 2 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once.at n=6A268633
• Number of n X 7 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totaling two exactly once.at n=1A268638
• T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once.at n=29A268639
• T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once.at n=34A268639
• T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.at n=34A269035
• Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.at n=1A269041
• Number of ternary palindromes of length 2n+1 having no (7/4)+ powers.at n=45A279625
• Coefficients in expansion of Eisenstein series -q*(d/dq)(q*(d/dq)E_2).at n=9A282154
• a(n) = lcm(tau(n), sigma(n), pod(n)) / gcd(tau(n), sigma(n), pod(n)) where tau(k) is the number of divisors of k (A000005), sigma(k) is the sum of divisors of k (A000203) and pod(k) is the product of divisors of k (A007955).at n=17A329929
• a(n) = lcm(n, tau(n), sigma(n), pod(n)) / gcd(n, tau(n), sigma(n), pod(n)) where tau(k) is the number of divisors of k (A000005), sigma(k) is the sum of divisors of k (A000203) and pod(k) is the product of divisors of k (A007955).at n=17A334985
• Number of regions after generation n of Conant's dissection of a square when dissected with both orthogonal and diagonal lines and where the starting edges rotate clockwise around the square and the dissection halves in size every second generation.at n=16A335628