20589

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 MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T4 atom.at n=13A019172
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 84 ones.at n=20A031852
• Number of primitive Pythagorean-like triples a^2+b^2=c^2+k for k=5 with 0<c<=10^n.at n=4A121088
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = floor(M(n)).at n=26A139076
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = round(M(n)).at n=26A139077
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 0, 1), (0, 0, 1), (1, 1, -1)}.at n=10A148374
• G.f. satisfies: A(x) = 1 + Sum_{n>=1} x^n*A_{n-1}(x)^n where A_{n}(x) = A_{n-1}(x) + x^n*A_{n-1}(x)^n for n>0 with A_0(x)=1.at n=13A194563
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 517", based on the 5-celled von Neumann neighborhood.at n=27A272732