36977

Appears in sequences

• n*10^3-1, n*10^3-3, n*10^3-7 and n*10^3-9 are all prime.at n=20A064977
• Numbers k that divide the sum of digits of 13^k.at n=53A175525
• Numbers n such that 2*71^n + 1 is prime.at n=9A190942
• Constant term of the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=18A192962
• Number of n-bead necklaces labeled with numbers 1..5 not allowing reversal, with no adjacent beads differing by more than 1.at n=12A208774
• Main diagonal of Ludic array A255127 (and A255129): a(n) = A255127(n,n).at n=30A255410
• Number of sets of nonempty words with a total of n letters over nonary alphabet containing the ninth letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.at n=5A293890
• G.f. A(x) satisfies: A(x) = 1/(1 + (-x)^a(0)/(1 + (-x)^a(1)/(1 + (-x)^a(2)/(1 + (-x)^a(3)/(1 + ...))))), a continued fraction.at n=19A307543