17983

Appears in sequences

• Patterns in a dual ring.at n=15A007574
• Sums of members of groups in A076063.at n=32A076066
• Expansion of (1+x-2*x^2)/(1-21*x^2-7*x^3).at n=7A121458
• Number of claw-free Berge perfect graphs on n nodes.at n=9A123413
• Numbers k such that k-1 and k+1 are each the product of exactly 7 primes, counted with multiplicity.at n=2A157487
• Binary order of n plus number of partitions of n-1.at n=36A163295
• Number of binary strings of length n with no substrings equal to 0001, 0110, or 1110.at n=28A164482
• Total number of parts that are not the smallest part in all partitions of n.at n=28A182984
• a(n) = Sum_{i=0..n} digsum_8(i)^3, where digsum_8(i) = A053829(i).at n=49A231682
• Riordan array read by rows, corresponding to g.f. (1+x*y^3)/((1-x-y)*(1+x*y^3)+x*y^4).at n=46A239102
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 145", based on the 5-celled von Neumann neighborhood.at n=30A270288
• Number of connected induced (non-null) subgraphs of the antiprism graph with 2n nodes.at n=7A286183
• Numbers k such that phi(k) > phi(k+1) > phi(k+2) > phi(k+3) where phi is the Euler totient function (A000010).at n=29A326817
• Number of quaternary steady words of length n (with respect to the permutations of symbols).at n=44A357250
• Centered 27-gonal numbers.at n=36A389797
• Expansion of g^2/(1 - x^3*g^4), where g = 1+x*g^4 is the g.f. of A002293.at n=6A391083