19487

Appears in sequences

• "AGK" (ordered, elements, unlabeled) transform of 2,1,1,1,...at n=21A032024
• Number of base 17 circular n-digit numbers with adjacent digits differing by 3 or less.at n=5A125327
• For each permutation p of {1,2,...,n} define min(p) = min{ p(i) + i : i = 1..n }; a(n) is the sum of min(p) of all p.at n=6A129591
• a(n) = n*(2*n^2 + 5*n + 17)/2.at n=26A163661
• Expansion of 1/(1-x^2-x^3+x^7-x^8+x^10).at n=46A174577
• Number of numbers in n-th generation of the tree of Gaussian rationals at A233696.at n=13A245264
• Smallest base b > 1 such that both prime(n) and prime(n+1) are base-b Wieferich primes, i.e., p = prime(n) satisfies b^(p-1) == 1 (mod p^2) and q = prime(n+1) satisfies b^(q-1) == 1 (mod q^2).at n=22A259075
• The distribution of the distance from the first weak subcedance to 1 on permutations.at n=28A350158
• G.f. satisfies A(x) = Sum_{n>=1} A(x^3)^n / A(x^(2*n)), with A(0) = 0 and A'(0) = 1.at n=28A383376