23790

Appears in sequences

• Theta series of 15-dimensional unimodular lattice A15+.at n=4A004536
• Theta series of A*_15 lattice.at n=64A023927
• Number of distinct minimal unary DFA's with exactly n states.at n=11A059412
• Theta series of GH39, an extremal unimodular 39-dimensional lattice.at n=4A066234
• Numbers n such that the denominator of the 2n-th Bernoulli number is divisible by n but sum_{d|n} sigma(d)/phi(d) is not an integer.at n=15A099008
• Numbers n such that n divides the denominator of 2n-th Bernoulli number.at n=39A106741
• a(n) = 4394*n + 1820.at n=5A156636
• T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=16A186486
• T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=19A186486
• T(n,m)=Number of (n+1)X6 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=16A188837
• T(n,m)=Number of (n+1)X3 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=40A190023
• G.f.: A(x) = 1 + x*A(x)^3 / ( A(-x)*A(I*x)*A(-I*x) ), where I^2 = -1.at n=7A216712
• Numbers k satisfying gcd(k^2, sigma(k^2)) > sigma(k), where sigma is the sum-of-divisors function.at n=15A322154
• a(n) is the smallest number that can be partitioned into n ways as the sum of two Moran numbers.at n=42A337862