75264

Appears in sequences

• B-trees of order 5 with n labeled leaves.at n=22A058521
• Arithmetic derivative of cubes: a(n) = 3*n^2*A003415(n).at n=27A068721
• Triangle read by rows: T(n,k) = 2^k * (n!/k!)*binomial(n-1,k-1).at n=33A086915
• a(n) = 18n^3 + 6n^2.at n=16A087887
• Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k weak ascents (1<=k<=n). A Schroeder path of length 2n is a lattice path from (0,0) to (2n,0) consisting of U=(1,1), D=(1,-1) and H=(2,0) steps and never going below the x-axis. A weak ascent in a Schroeder path is a maximal sequence of consecutive U and H steps.at n=39A114655
• Enneagonal numbers whose sum of digits is also enneagonal.at n=20A117051
• Number of subsets S of {1,2,3,...,n} with the property that if x is a member of S then at least one of x/2 and 2x is also a member of S.at n=33A172148
• Number of subsets S of {1,2,3,...,n} with the property that if x is a member of S then at least one of x/2 and 2x is also a member of S.at n=34A172148
• Conjectured list of fully multisociable numbers.at n=38A183029
• Numbers k such that the sum of prime factors of k (counted with multiplicity) equals five times the largest prime divisor of k.at n=32A212863
• Sum of the divisors of n^3+1.at n=40A234645
• T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=46A239599
• Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=8A239600
• Positive integers, c, such that there are more than two solutions to the equation a^2 + b^3 = c^4, with a, b > 0.at n=43A242381
• Number of length 3+1 0..2*n arrays with the sum of the absolute values of adjacent differences equal to 3*n.at n=26A249983
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=16A278469
• a(n) = 3*(n - 1)^2*n^3.at n=8A300846
• Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).at n=62A338217
• Let S(n)=sigma(n)/3. Numbers k such that S^m(k)=k, 1/3-sociable numbers (of any order).at n=14A356548
• Numbers k such that A000005(k) = A000688(k).at n=16A369168