22798

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 NES = NU-87 H4[Al4Si64O136].nH2O starting with a T3 atom.at n=13A019204
• a(n) = prime(n)^2-3.at n=35A182200
• G.f.: x^(k^2)/(mul(1-x^(2*i),i=1..k)*mul(1+x^(2*r-1),r=1..oo)) with k=3.at n=51A246579
• Total number of torsion-free congruence subgroups of PSL(2,Z) of genus n.at n=23A258696
• Values of c such that p^2-c and p^2+c are both positive primes, for the special case when p^2-c = 3, or c = p^2-3, where p is a prime.at n=11A274610
• Indices where prime(n) first appears in A373902.at n=36A371618