35427

Appears in sequences

• Expansion of 1/(1 - 4*x + 5*x^2 - 3*x^3).at n=11A027439
• Numbers n such that 8*10^n + 4*R_n - 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=17A103079
• a(n+1) = a(n) + floor(a(n)/5) with a(0)=5.at n=51A182306
• Number of (n+1) X (n+1) -3..3 symmetric matrices with every 2 X 2 subblock having sum zero and one or two distinct values.at n=18A211322
• a(n) = number of tuples (a,b,c,d) of natural numbers a,b,c,d <= n with gcd(a,b)=gcd(b,c)=gcd(c,d)=gcd(d,a)=1.at n=18A256391
• Number of 4 X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.at n=34A266937
• Numbers n such that there are precisely 15 groups of orders n and n + 1.at n=17A295995
• Numbers k such that 2^k + 1 is divisible by the sum of its decimal digits.at n=17A333474
• Numbers that are the sum of seven fourth powers in eight or more ways.at n=17A345574
• Numbers that are the sum of seven fourth powers in nine or more ways.at n=5A345575
• Numbers that are the sum of seven fourth powers in exactly nine ways.at n=4A345831
• G.f. A(x) satisfies: A(x) = 1 / (1 - 2*x - x * A(2*x)).at n=5A348903
• G.f. A(x) satisfies A(x) = 1 / (1 - x - x * (1 + x + x^2) * A(x^3)).at n=11A367656
• Expansion of (1/x) * Series_Reversion( x / ((1+x)^2 * (1+x+x^2)^3) ).at n=5A369480
• Expansion of Product_{k>=1} (1 + x^k) * (1 + x^(k^2)) * (1 + x^(k^3)).at n=48A369575