47696

Appears in sequences

• Number of maximal initial consecutive columns ending at the same level, summed over all deco polyominoes of height n.at n=7A140710
• Self-locating strings within Pi: numbers n such that the string n is at position n (counting 3 and the decimal point) in decimal digits of Pi.at n=4A153220
• G.f.: A(q) = exp( Sum_{n>=1} A002129(n) * 2*A006519(n) * q^n/n ).at n=52A161800
• G.f. is Q_0(q) where Q_0(q^4) is a series quadrisection of the g.f. of A161800.at n=13A161801
• Ordered differences of central binomial coefficients.at n=42A205008
• G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^2 * x^k*(4-x)^(n-k).at n=7A217461
• Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=4A222686
• T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=32A222690
• Number of 5Xn 0..2 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=3A222694
• Numbers whose sum of prime factors is equal to their product of prime indices.at n=43A331384
• a(n) = Sum_{k=0..floor(n/2)} (n-2*k)^(n-k).at n=6A353013