23076

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 MTT = ZSM-23 Nan[AlnSi24-nO48] starting with a T6 atom.at n=13A019191
• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 9 sites wide.at n=51A058364
• Numbers k such that the k-th triangular number contains only digits {2,4,6}.at n=4A119161
• Number of compositions of n into odd blocks with one element in each block distinguished.at n=14A119749
• Expansion of phi(q) * phi(-q^18) / (phi(-q^3) * phi(-q^6)) in powers of q where phi() is a Ramanujan theta function.at n=51A139213
• Expansion of q * psi(-q) * chi(-q^6) * psi(-q^9) / (phi(-q) * phi(-q^18)) in powers of q where phi(), psi(), chi() are Ramanujan theta functions.at n=50A233693
• Expansion of f(x^2, x^4) * f(x^3, x^3) / f(-x, -x^2)^2 in power of x where f(, ) is Ramanujan's general theta function.at n=17A260058
• Expansion of f(-x^6)^2 / (phi(-x) * phi(-x^9)) in powers of x where phi(), f() are Ramanujan theta functions.at n=25A261203
• Expansion of (psi(x) * psi(x^3) / f(-x^3)^2)^2 in powers of x where psi(), f() are Ramanujan theta functions.at n=25A263528
• Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.at n=3A264489
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.at n=39A264490
• Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.at n=5A264492
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=3} (n-|i|)*(n-|j|).at n=23A331774
• a(n) = binomial(n+3, 4) + binomial(n+1, 3) + 1.at n=25A368881