79431

Appears in sequences

• Sum of terms in n-th row of A077316.at n=32A077318
• G.f. A(x) satisfies: x = A(x) * (1 + 2*A(x)) * (1 - 3*A(x)).at n=7A250889
• Start with the hexagonal tile of the Shield tiling and recursively apply the substitution rule. a(n) is the number of square tiles after n iterations.at n=9A298679
• Numbers k for which A003973(k) is equal to 2*sigma(k).at n=29A337384