134456

Appears in sequences

• Expansion of g.f.: (1+x)/(1-7*x).at n=6A003950
• a(n) = Product_{j=0..5} floor((n+j)/6).at n=43A008881
• Triangle of numbers in which i-th row is {2^(i-j)*7^j, 0<=j<=i}; i >= 0.at n=41A036565
• Numbers of form 7^i*8^j with i, j >= 0, sorted.at n=22A036566
• Sums of 2 distinct powers of 7.at n=20A038481
• Sums of two powers of 7.at n=26A055258
• Coefficient triangle for certain polynomials.at n=26A055864
• Numbers that factorize into a prime number of factors all raised to different prime exponents and no number appears both as an exponent and as a prime factor.at n=31A114131
• Numbers such that each of the first 2j primes appears exactly once in the prime factorization, either as factor or exponent.at n=10A114132
• a(n) = if n mod 2 = 1 then (n^2-1)*n^3/4 else n^5/4.at n=14A122657
• Triangle read by rows: T(n,k) = number of forests on n labeled nodes, where k is the maximum of the number of edges per tree (n>=1, 0<=k<=n-1).at n=34A143911
• Triangle T(n,k) formed by the coordination sequences and the number of leaves for trees.at n=42A158497
• Expansion of e.g.f. exp(t*x)/(1 - x^2/t^2 - t^3* x^3).at n=76A158757
• Expansion of e.g.f.: exp(t*x)/(1 - x^2/t - t^3*x^3).at n=57A158785
• First differences of A160428.at n=31A160429
• Number of reduced words of length n in Coxeter group on 8 generators S_i with relations (S_i)^2 = (S_i S_j)^7 = I.at n=6A164373
• Number of reduced words of length n in Coxeter group on 8 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I.at n=6A164769
• Number of reduced words of length n in Coxeter group on 8 generators S_i with relations (S_i)^2 = (S_i S_j)^9 = I.at n=6A165215
• Number of reduced words of length n in Coxeter group on 8 generators S_i with relations (S_i)^2 = (S_i S_j)^10 = I.at n=6A165786
• Number of reduced words of length n in Coxeter group on 8 generators S_i with relations (S_i)^2 = (S_i S_j)^11 = I.at n=6A166366