197120

Appears in sequences

• Degrees of irreducible representations of Suzuki group Suz.at n=38A003902
• Expansion of (1+2*x) / (1-2*x)^4.at n=9A014483
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (1, p(1), p(2), ...).at n=29A024470
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (primes).at n=28A024478
• Duplicate of A024478.at n=28A025090
• Numbers k that divide the (right) concatenation of all numbers <= k written in base 17 (most significant digit on left).at n=20A029462
• Sums of the squares of the elements in the subsets of the integers 1 to n.at n=10A087076
• Let P(A) be the power set of an n-element set A and let B be the Cartesian product of P(A) with itself. Remove (y,x) from B when (x,y) is in B and x <> y and let R35 denote the reduced set B. Then a(n) = the sum of the sizes of the union of x and y for every (x,y) in R35.at n=8A133224
• Triangular sequence from a Peters polynomials expansion: l0 = 2; m0 = 2; p(t) = (1 + t)^x/(1 + (1 + t)^l0)^m0.at n=42A137393
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of max(3i-j, 3j-i), as in A204156.at n=29A204157
• Denominators of a Boas-Buck sequence for the triangular Sheffer matrix S2[3,1] = A282629.at n=9A321330
• Ordered perimeters of the Pythagorean triangles defined by a = 2^(4n) + 2^(2n+1), b = 2^(4n) - 2^(4n-2) - 2^(2n) - 1, c = 2^(4n) + 2^(4n-2) + 2^(2n) + 1.at n=3A381008
• a(n) = binomial(n,3) + 6*binomial(n,4) + 15*binomial(n,5) + 15*binomial(n,6).at n=16A382081