18204

Appears in sequences

• Coordination sequence for sigma-CrFe, Position Xd.at n=34A009959
• Number of partitions of 1/n into 4 reciprocals of positive integers.at n=17A020327
• Perimeters of more than one primitive Pythagorean triangle.at n=33A024408
• Initial pile sizes that guarantee a win for player 2 in a variant of Fibonacci Nim where the players may not take one stone.at n=42A052492
• Numbers n such that n | sigma_12(n).at n=25A055716
• Numbers n such that A001414(n) = sum of squared digits of n.at n=33A094908
• p(11p-7) where p is prime.at n=12A098998
• a(n) = n! * Sum_{k=1..n} binomial(n,k)/k.at n=5A103213
• a(n) = floor(2^n*(n/3 + 4/9)).at n=12A127985
• (L)-sieve transform of {1,4,7,10,...,3n-2,...} (A016777).at n=21A152009
• Number of permutations of 1..n containing the relative rank sequence { 164235 } at any spacing.at n=3A159135
• Sums of the antidiagonals of Sundaram's sieve (A159919).at n=35A159920
• Number of partitions p of n such that the number of numbers having multiplicity 1 in p is a part or the number of numbers having multiplicity > 1 is a part.at n=37A239737
• The first of 50 consecutive positive integers the sum of the squares of which is a square.at n=21A269451
• Sum of the degrees of asymmetry of all compositions of n.at n=14A275434
• Number of permutations p of [n] such that |p(i) - p(i-1)| is in {2,5} for all i from 2 to n.at n=24A307269
• Self-convolution of the Dedekind psi function (A001615).at n=35A307502
• Triangle read by rows: row n gives coefficients T(n,k), in descending powers of m, of a polynomial Q_n(m) (of degree n - 1) in an expression for the number of subdivisions A(m,n) of a grid with two rows.at n=26A336244
• Array read by ascending antidiagonals. A(n, k) = k! * [x^k] log((1 - x) / (1 - 2*x)) / (1 - x)^n, for 0 <= k <= n.at n=34A355257
• Expansion of e.g.f. 1 / (7 - 6 * exp(x))^(2/3).at n=4A365556