37408

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NAT = Natrolite Na16[Al16Si24O80].16H2O starting from a T2 atom.at n=14A019201
• a(1)=1, a(n)=a(n-a(1))+a(n-a(2))+a(n-a(3))+....a(n-a(n-1)) for n>1, with convention that a(i)=0 for i<=0.at n=13A052109
• Number of trivalent connected (or cubic) graphs with 2n nodes that are not planar.at n=8A204186
• Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.at n=1A207791
• Number of (n+1) X 3 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.at n=1A207793
• T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.at n=4A207799
• Practical numbers q with q + 2 and q^2 + 2 both practical.at n=20A294225
• Number of partitions of 2n whose Ferrers-Young diagram cannot be tiled with dominoes.at n=23A304710
• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = Product_{j>0} (1-x^j)^(-u/j).at n=31A338805
• a(n) = n * Sum_{d|n} binomial(d+3,4)/d.at n=27A343545