688128

Appears in sequences

• Triangle of coefficients in expansion of (1+8x)^n.at n=33A013615
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*1^j.at n=30A038279
• a(n) = binomial(n-1,2)*n^(n-3).at n=7A053507
• Denominators of coefficients of 1/2^(2n+1) in Newton's series for Pi.at n=10A054388
• Triangle read by rows: T(n, k) is the number of labeled trees on n nodes with maximal node degree k (0 < k < n).at n=30A061356
• 17-almost primes (generalization of semiprimes).at n=8A069278
• a(1) = 1; a(n) is the smallest multiple of a(n-1) not divisible by 10 which is greater than the digit reversal of a(n-1). In case R(a(n-1)) < a(n-1) then a(n) = 2*a(n-1).at n=15A076086
• a(n) = n*2^(n-6).at n=15A078836
• 8th binomial transform of (0,0,1,0,0,0, ...).at n=7A081138
• Denominator of 4*(Integral_{x=0..1} (1-x^2)^((2n-1)/2) dx)/Pi.at n=8A086891
• Triangle, read by rows, of coefficients for the third iteration of the hyperbinomial transform.at n=39A089463
• Expansion of (1-4x)/((1+4x)(1-8x)).at n=7A091905
• Triangle T(n,k) of numbers of connected (unicyclic) graphs with unique cycle of length k (3<=k<=n), on n labeled nodes.at n=15A098909
• n*(n-1)*4^n.at n=7A128798
• 3n(n-1)4^(n-2).at n=8A129532
• Second differences of A129952.at n=17A129954
• Row sums of triangle A133935.at n=17A131352
• Number of connected components in the double Bruhat cells for simple Lie groups of type B_n (or C_n).at n=14A131769
• T(i,j) = (-1)^(i+j)*(i+1)*binomial(i,j)*2^(i-j)*4^j.at n=33A137337
• Triangle A061356 read right to left.at n=33A139526