23036

Appears in sequences

• Triangle of coefficients of di-Boustrophedon transform (see A063179) read by rows: Let the original sequence be (U0,U1,...) and the transformed sequence (V0,V2,...), then Vn is a linear combination of U0,...,Un. T(n,m) is the coefficient that goes with Um to get Vn.at n=47A063415
• n*10^2-1, n*10^2-3, n*10^2-7 and n*10^2-9 are all prime.at n=29A064976
• Expansion of x^4*(2+x)/((1+x)*(1-x)^5).at n=22A082289
• Expansion of (1+x+x^2)/((1+x^2)*(1+x)^4*(1-x)^5).at n=45A082290
• a(n+1)-+a(n)=prime, a(n+1)*a(n)=Average of twin prime pairs, a(1)=3,a(2)=10.at n=35A154496
• T(n,k)=Number of n X n 0..k arrays with row sums equal and no column sum equal to the previous.at n=17A202714
• Number of 3X3 0..n arrays with row sums equal and no column sum equal to the previous.at n=3A202715
• Number of multi-directed animals with n vertices.at n=6A222205
• Expansion of psi(x^4) / f(-x) in powers of x where psi(), f() are Ramanujan theta functions.at n=35A226635