31087

Appears in sequences

• a(n) = (9^n + 5^n)/2.at n=5A081338
• Antidiagonal sums of A086272 (and of A086273).at n=27A086274
• Number of partitions of n with a product greater than n.at n=39A114324
• Numbers of the form x^5 + 10*x^3*y^2 + 5*x*y^4 (where x,y are integers).at n=34A135794
• Numerator of the polynomial A_i(x) = Sum_{d=1..i-1} x^(i-d)/d for index i=2n+1 evaluated at x=7.at n=1A145621
• a(n) = numerator of polynomial of genus 1 and level n for m = 7 : A[1,n](7).at n=4A145666
• Numbers of the form (5^j + 9^k)/2, for j and k >= 0.at n=40A226794
• Numbers n such that n*2^2281 - 1 is prime.at n=29A265504
• Numbers n such that n^2 = a^2 + b^5 (with integers a, b > 0) and gcd(a, b, n) = 1.at n=24A293284