21054

Appears in sequences

• Least term in period of continued fraction for sqrt(n) is 10.at n=31A031434
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=5, I={0,2}.at n=31A079966
• a(n) = Taylor coefficient at x=li(e) of the inverse of the function li(x) (the logarithm integral) multiplied by exp(n).at n=9A089963
• Integers that are Rhonda numbers to base 9.at n=1A100973
• Triangle read by rows, related to A108283.at n=30A108284
• Generalized Catalan numbers for triangle A119335.at n=11A119365
• Index sequence to A089840: positions of bijections that preserve A127302 (the non-oriented form of binary trees) and whose behavior does not depend on whether there are internal or terminal nodes (leaves) in the neighborhood of any vertex.at n=43A153830
• a(n) = 841*n^2 + 29.at n=5A158665
• Sequence generated from Lim:_{n..inf.} M^n, M = an infinite lower triangular matrix with (1,3,3,3,...) in every column, shifted down twice.at n=41A171370
• a(n) = 25*n^2 + n.at n=28A173089
• G.f.: 1/(1 + x*d/dx log(eta(x))), where eta(x) is Dedekind's eta(q) function without the q^(1/24) factor.at n=10A180305
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood.at n=37A270683
• A(n,k) is the n-th Rhonda number to base A002808(k), the k-th composite number; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=11A291925
• Ordered perimeters p of primitive Pythagorean triangles no side of which is squarefree.at n=36A329392