23437

Appears in sequences

• Sum_{T(i,j)}, 0<=j<=i, 0<=i<=n, where T is the array in A026386.at n=11A026396
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = a(3) = 1.at n=18A049887
• a(n) = (3*5^n - 1)/2.at n=6A057651
• Number of binary polynomials of degree n irreducible over the integers.at n=15A087482
• Square array of numbers read by antidiagonals where T(n,k) = ((k+3)*(k+2)^n-2)/(k+1).at n=51A090842
• a(n) = Sum_{k=0..n} C(floor((n+1)/2),floor((k+1)/2))*2^k.at n=12A097162
• Triangular array: T(n,k) = T(n,n) = 1, T(n,k) = 5*T(n-1, k-1) + 2*T(n-1, k), read by rows.at n=34A119727
• Integers k such that A166100(k)/A005408(k) is not an integer.at n=34A166101
• Moore lower bound on the order of a (6,g)-cage.at n=10A198306
• n^3 + floor(n^3/2).at n=24A211786
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=26A218172
• a(n) = 5*a(n-2) + 2, a(0) = 1, a(1) = 2.at n=12A238366
• Numbers n such that (n^n-2)/(n-2) is an integer.at n=29A242787
• Number of simple graphs covering the vertices {1..n} whose weakly nesting edges are connected.at n=6A326337
• Record terms of A349664.at n=27A349665