77824

Appears in sequences

• Number of proper factorizations of p1^n*p2^4, where p1 and p2 are distinct primes.at n=21A031127
• First differences of A045623.at n=15A045891
• a(n) = (3*n-1) * 2^(n-2).at n=12A053220
• 13-almost primes (generalization of semiprimes).at n=20A069274
• Number of 3 X n binary matrices avoiding simultaneously the right angled numbered polyomino patterns (ranpp) (10;0) and (01;1).at n=10A100312
• a(n) = 19*2^n.at n=12A110288
• Triangle T, read by rows, such that T^2 = SHIFT-UP(T); i.e., the matrix square of T shifts each column of T up 1 row, dropping the main diagonal consisting of the powers of 2: [T^2](n,k) = T(n+1,k) with T(n,n) = 2^n for n>=k>=0.at n=24A118022
• Record values in A003415 (arithmetic derivative).at n=36A131116
• Numbers with 26 divisors.at n=6A137489
• (n-1)-st elementary symmetric function of the first n terms of (1,2,1,2,1,2,1,2,1,2,...)=A000034.at n=24A203150
• Least number of the form 11*m-1 with exactly n prime factors, counted with multiplicity.at n=12A225210
• a(n) = n^6*(4*n+3).at n=4A229149
• Number of ascending runs in {1,...,4}^n.at n=7A229278
• Number of defective 4-colorings of an n X 2 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..3 order.at n=11A229572
• Numbers D such that D^2 = A^3 + B^4 + C^5 has more than one solution in positive integers (A, B, C).at n=22A256603
• Numbers D such that D^2 = A^3 + B^4 + C^5 and A^2 + B^3 + C^4 = d^2 for some positive integers A, B, C, d.at n=16A256613
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have a' * b' = k, where a' and b' are the arithmetic derivatives of a and b.at n=12A259675
• Numbers D such that D^2 = A^3 + B^4 + C^5 has more than two solutions in positive integers (A, B, C).at n=0A266967
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 222", based on the 5-celled von Neumann neighborhood.at n=24A286777
• Optimal link functions for repeat avoidance in double elimination tournaments.at n=16A356189