80780

Appears in sequences

• Numbers that are the sum of 8 positive 9th powers.at n=34A003397
• Pell numbers A000129 with 0 instead of last digit.at n=14A131726
• Number of lower triangles of an n X n 0..4 array with new values introduced in row major order 0..4 and no element equal to more than two horizontal or vertical neighbors.at n=3A194572
• T(n,k)=Number of lower triangles of an n X n 0..k array with new values introduced in row major order 0..k and no element equal to more than two horizontal or vertical neighbors.at n=24A194576
• G.f. A(x) satisfies A(x) = 1 + x^4 * (A(x) / (1 - x))^2.at n=23A361229