19112

Appears in sequences

• Index of central binomial coefficient C(2n,n) within A006987.at n=13A009561
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 69.at n=32A031567
• Susceptibility series H_4 for 2-dimensional Ising model (divided by 2).at n=9A055856
• Number of basis partitions of n+100 with Durfee square size 10.at n=24A069253
• Number of permutations of 1..n with each sum of three adjacent terms unique.at n=8A147634
• Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five or six distinct values for every i,j,k<=n.at n=12A211529
• Number of 3 X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.at n=26A239987
• a(n) = ceiling(n^3*(Pi/2)).at n=22A248198
• Number of (n+1)X(1+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=3A251030
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=9A251037
• Number of (4+1)X(n+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=0A251041
• Expansion of r(q)^4 / r(q^4) in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=37A285629
• a(0) = 2, a(1) = 2; for n > 1, a(n) = a(n-1) + 2*a(n-2) + 3.at n=13A290604
• Numbers k such that 483*2^k+1 is prime.at n=36A320339
• a(n) = A338268(k^2 + 2*n, k) for sufficiently large k.at n=24A338286