149878

Appears in sequences

• Schoenheim bound L_1(n,n-5,n-6).at n=34A036837
• a(n) = (9n^4 - 18n^3 + 18n^2 - 9n + 2)/2.at n=13A079903
• Numerator of (9*(n^4 - 2*n^3 + 2*n^2 - n) + 2)/(2*(2*n-1)).at n=13A096430
• Triangular numbers which are the sum of distinct double factorials (A006882).at n=36A115650
• a(n) = (binomial(n,5) - floor(n/5)) / 5.at n=35A215052
• Hexagonal numbers (A000384) in which parity of digits alternates.at n=25A297645
• G.f. A(x) satisfies: A(x) = Sum_{n>=0} x^n/(1 - x*A(x)^(2*n)).at n=9A340935