34020

Appears in sequences

• Expansion of Product_{k>=1} (1 - x^k)^15.at n=17A010822
• n written in fractional base 5/3.at n=45A024633
• Triangular matrix arising in enumeration of catafusenes, read by rows.at n=51A038763
• Number of directed multigraphs with loops on 3 nodes with n arcs.at n=13A050927
• Numbers k such that cototient(k) is a square and sets a new record for squares.at n=40A063753
• Like A073327, but multiply the numerical values of the letters instead of adding them.at n=4A075831
• Triangle of generalized Chebyshev coefficients.at n=38A080419
• a(n) = (n+1)*(n+2)*(n+9)*3^n/18.at n=6A080421
• Numbers n divisible by exactly three nontrivial permutations (rearrangements) of the digits of n.at n=5A090058
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).at n=23A120982
• Triangle read by rows: T(n,k) is number of hex trees with n edges and k branches (1 <= k <= n).at n=40A126179
• Triangle whose rows are generated by A136157^n * [1, 1, 0, 0, 0, ...].at n=48A136158
• G.f. A(x) satisfies: A(A(A(x))) = x + 9*x^2.at n=5A141118
• Numbers k such that 64*k^6 + 1091 is prime.at n=35A155809
• a(n) = 1000*n + 20.at n=33A157510
• Number of cycles with entries of opposite parities in all fixed-point-free involutions of {1,2,...,2n}.at n=6A161120
• Triangle of z Transform coefficients from General Pascal [1,10,1} A142459 polynomials multiplied by factor 3^Floor[(2*k - 1)/3].at n=30A167787
• Coefficients of expansion polynomials related to fish weight allometric equation: p(x,t)=-Exp[t*x]*(1 - Exp[t/3])^3.at n=13A171506
• Number of n X 3 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally.at n=5A181219
• Number of nX6 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally.at n=2A181222