33184

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 91.at n=32A031589
• Triangle of numbers, called Y(1,2), related to generalized Catalan numbers A062992(n) = C(2;n+1) = A064062(n+1).at n=39A115195
• a(n) = n*(n-1)*A056219(n+1).at n=15A166870
• Number of 6-step self-avoiding walks on an n X n square summed over all starting positions.at n=12A188151
• Total number of repeated parts in all partitions of n.at n=29A194452
• Number of 2 X 2 matrices having all terms in {1,...,n} and nonnegative determinant.at n=15A211058
• G.f. satisfies: A(x) = Sum_{n>=0} x^n/A(x)^n * Product_{k=0..n} k!.at n=5A219269
• Number of length n+3 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=14A255110
• Number of permutations in S_n that avoid the pattern 25314.at n=8A256195
• Number of surviving (but not bifurcating) nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).at n=36A293521
• a(1)=1; for n>1, a(n) = least integer greater than a(n-1) such that the sums of the divisors of the pairwise sums of a(1),...,a(n) are all distinct.at n=47A293542
• Number of fundamentally different graceful labelings of digraphs with n arcs.at n=6A341884