23515

Appears in sequences

• Denominators of continued fraction convergents to sqrt(282).at n=11A041531
• Numbers k such that k^2 contains only digits {2,5,9}.at n=11A053928
• Sum of primes between n and n^2.at n=22A109818
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 9.at n=27A136977
• G.f.: A(x) = F(x*G(x)^2) where F(x) = G(x/F(x)) = 1 + x*F(x)^2 is the g.f. of A000108 (Catalan) and G(x) = F(x*G(x)) = 1 + x*G(x)^3 is the g.f. of A001764.at n=7A153295
• Number of arrays of median of three adjacent elements of some length 7 0..n array, with no adjacent equal elements in the latter.at n=7A229015
• Number of partitions p of n such that the number of numbers having multiplicity 1 in p is a part and the number of numbers having multiplicity > 1 is not a part.at n=47A241416
• Erroneous version of A002468.at n=7A260783
• G.f. A(x) satisfies: A(x) = A( x^7 + 7*x*A(x)^7 )^(1/7), with A(0)=0, A'(0)=1.at n=7A271932
• Solution of the complementary equation a(n) = 2*a(n-1) - a(n-2) + b(n-1) + n, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=39A294872
• G.f. A(x) satisfies 7*x = Sum_{n=-oo..+oo} (-1)^n * x^(7*n) * (A(x) + x^n)^(7*n) with A(0) = 1.at n=6A380684
• G.f. A(x) satisfies: A(x)^7 = A(x^7) / (1 - 7*x).at n=7A386647