18265

Appears in sequences

• Coordination sequence for alpha-Mn, Position Mn2.at n=35A009951
• Numbers k such that the continued fraction for sqrt(k) has period 49.at n=23A020388
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 9.at n=28A031422
• n+p(n)+p(p(n)) is a palindrome, where p(n) denotes the n-th prime.at n=32A116037
• a(1)=1. a(n) = a(n-1) + (sum of the terms, from among terms a(1) through a(n-1), which are coprime to sum{k=1 to n-1} a(k)).at n=11A131347
• a(n) + a(n+1) + a(n+2) = n^3.at n=39A152728
• a(n) = A000041(n) + n*A032741(n).at n=36A168015
• Number of (w,x,y) with all terms in {0,...,n} and x != max(|w-x|,|x-y|).at n=26A213496
• Number of binary strict trees of weight n.at n=15A300442
• Number of compositions of n with strictly increasing differences.at n=45A325547
• Number of numbers with sum of digits n in fractional base 4/3.at n=47A364780
• Expansion of g.f. A(x) satisfying -x = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n-1)/2) * A(x)^(n^2).at n=7A369085
• a(n) is the numerator of the real part of Product_{k=1..n} (1/k + i) where i is the imaginary unit.at n=8A370547
• a(n) is the numerator of the imaginary part of Product_{k=1..n} (1 + i/k) where i is the imaginary unit.at n=8A370553