20638

Appears in sequences

• Maximal elements of pairs of "Super Unitary Amicable Numbers", sorted by their minimal elements.at n=37A045614
• a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A049735.at n=26A049738
• a(n) = (n^5 + 145*n^4 + 905*n^3 + 155*n^2 + 594*n + 120)/120.at n=10A143060
• Number of nX5 0..2 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=4A222485
• T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=40A222488
• Number of 5Xn 0..2 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=4A222492
• Growth series for affine Coxeter group (or affine Weyl group) D_9.at n=8A266764