18794

Appears in sequences

• a(n+1) = a(n)+greatest prime divisor of a(n-1).at n=46A078695
• G.f. A(x/(1-x)), where A = g.f. for A090351.at n=6A111343
• 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, 0), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.at n=9A149247
• A(x) = C(x) * C(x^2) * C(x^4) * C(x^8) *...; C = Catalan, A000108.at n=10A179277
• Expansion of Product_{k>=1} (1 + x^prime(k))/(1 - x^prime(k)).at n=53A300413
• Expansion of Sum_{n>=1} q^(n*(n-1)) / (1-q)^n.at n=40A321481
• Number of equivalence classes of length n squarefree reduced words over {0, 1, 2, 3} under action of renaming symbols.at n=26A343484
• Number of strict integer compositions of n whose leaders of increasing runs are increasing.at n=37A376263
• Number of integer partitions of n having a permutation with all equal run-lengths.at n=38A383013