18746

Appears in sequences

• Numbers n such that 197*2^n-1 is prime.at n=26A050850
• Number of 5-gonal compositions of n into positive parts.at n=30A069983
• Partial sums of A004977.at n=27A116100
• Erroneous version of A140763.at n=28A159579
• Number of binary strings of length n with equal numbers of 00000 and 11011 substrings.at n=15A164190
• Number of ways to place 2 nonattacking wazirs on an n X n board.at n=13A172225
• Number of (w,x,y) with all terms in {0,...,n} and w != max(|w-x|, |x-y|).at n=26A213501
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 646", based on the 5-celled von Neumann neighborhood.at n=45A273328
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. .at n=15A286798
• Expansion of Product_{k>=2} (1 + x^k)/(1 - x^k).at n=31A300415
• Partial sums of icosahedral numbers (A006564).at n=12A302560
• Total volume of all rectangular prisms with dimensions r X s X t where r, s and t are the smallest, middle and largest parts in each partition of n into 3 parts.at n=25A307684
• a(n) = n*(2*n - 3 - (-1)^n)*(11*n + (-1)^n)/24.at n=27A308026
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^binomial(k+5,6).at n=11A344206
• a(n) = (n+1)*(n^n) - n + 1.at n=4A351331