300456

Appears in sequences

• Second (lower) diagonal of partition triangle A047812.at n=23A007045
• a(n) = (sigma(2*n) - sigma(n))*Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.at n=17A225525
• Number of nX4 0..1 arrays with every element equal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=8A300642