81676

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 MEI = ZSM-18 Nan[AlnSi34-nO68].28H2O (n=2.1-5.7) starting with a T3 atom.at n=15A019147
• Composite n such that (n-1)*phi(n) is a perfect square.at n=39A069953
• Triangle read by rows: T(n,k) is the number of multigraphs without loops on n labeled nodes with k edges and maximum degree 2.at n=42A095693
• Slowest increasing sequence all of whose successive digits are the digits of the Fibonacci numbers.at n=13A105967
• Admirable Harshad numbers n such that the subtracted divisor is equal to the digital sum of n.at n=35A111948
• Number of (w,x,y,z) with all terms in {1,...,n} and w >= harmonic mean of {x,y,z}.at n=19A212107