39784

Appears in sequences

• Number of 3's in all partitions of n.at n=38A024787
• Number of occurrences of smallest prime factor in all partitions of n-th composite number: a(n)=A066633(A002808(n), A056608(n)).at n=25A091109
• Number of n X 2 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totaling four exactly once.at n=3A269823
• Number of nX4 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.at n=1A269825
• T(n,k)=Number of nXk 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.at n=11A269829
• T(n,k)=Number of nXk 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.at n=13A269829
• a(0) = 1; for n > 0, a(n) is the coefficient of x^a(n-1) in the expansion of Product_{k=0..n-1} (x^a(k) + 1 + 1/x^a(k)).at n=20A367736