20996

Appears in sequences

• Prime(a(n)) + ... + prime(a(n)+3) is a square = A051395(n)^2.at n=23A072849
• Number of rooted identity trees with n generators.at n=11A108523
• Number of partitions of n which represent first player winning Chomp positions.at n=37A112471
• a(n) = 25*n^2 - n.at n=28A157514
• a(n) = 841*n^2 - 29.at n=4A158667
• Number of (n+1) X (1+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical, diagonal and diagonal neighbors, with values 0..2 introduced in row major order.at n=4A231310
• Number of (n+1) X (5+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical, diagonal and diagonal neighbors, with values 0..2 introduced in row major order.at n=0A231314
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical, diagonal and diagonal neighbors, with values 0..2 introduced in row major order.at n=10A231315
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical, diagonal and diagonal neighbors, with values 0..2 introduced in row major order.at n=14A231315
• a(n) = Sum_{i=0..n} digsum_9(i)^3, where digsum_9(i) = A053830(i).at n=51A231686
• G.f.: Product_{m>0} (1 + x^m + 2!*x^(2*m) + 3!*x^(3*m)).at n=29A289485
• Numbers that are the sum of six fourth powers in five or more ways.at n=5A345562
• Numbers that are the sum of six fourth powers in exactly five ways.at n=5A345817
• Position of 2310^n among 11-smooth numbers A051038.at n=3A372402