20260

Appears in sequences

• Coordination sequence for A_4 lattice.at n=12A008383
• a(n) = [ 3rd elementary symmetric function of {sqrt(k)} ], k = 1,2,...,n.at n=15A025194
• Multiplicity of highest weight (or singular) vectors associated with character chi_102 of Monster module.at n=45A034490
• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n-1 <= 2^(p+1), with a(1) = 1, a(2) = 3, and a(3) = 4.at n=14A049978
• Triangle, read by rows, equal to P^4, where triangle P = A135880; also equals Q^2, where triangle Q = P^2 = A135885.at n=23A135891
• Triangle, read by rows, equal to P^6, where triangle P = A135880; also equals Q^3 where Q = P^2 = A135885.at n=16A135893
• Indices k such that A020503(k)=Phi[k](-4) is prime, where Phi is a cyclotomic polynomial.at n=45A138926
• Indices k such that A019322(k) = Phi[k](4) is prime, where Phi is a cyclotomic polynomial.at n=47A138934
• Number of integer sequences of length n+1 with sum zero and sum of absolute values 24.at n=3A157061
• Number of partitions of n containing no part i of multiplicity i.at n=39A276429
• Numbers m > 0 that have a divisor d > 1 with binomial(m+d, d) == 1 mod m.at n=35A290040
• Number of nX2 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=12A317890
• a(n) = Sum_k k*A333275(n,k).at n=12A333277
• Triangle T(n,d) read by rows: the number of mixed trees with n>=1 nodes and 0<=d<n arcs.at n=40A335362
• Number of integer partitions of n whose mean is a mode, i.e., partitions whose mean appears at least as many times as each of the other parts.at n=59A363724