30172

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AEI = AlPO4-18 [Al24P24O96] starting with a T1 atom.at n=6A018941
• Numbers k such that sigma(k - 2) = sigma(k + 2).at n=27A223091
• Number of integers in n-th generation of tree T(1/3) defined in Comments.at n=42A274143