42075

Appears in sequences

• Enneagonal numbers for which the product of the digits is also an enneagonal number.at n=39A117052
• Enneagonal numbers divisible by 9.at n=25A117796
• Number of Fibonacci parts in the last section of the set of partitions of n.at n=37A144117
• a(n) = (2*n^3 + 5*n^2 - 7*n)/2.at n=33A162261
• Number of rooted binary leaf-multilabeled trees with n leaves on the label set [5].at n=6A220822
• a(n) = a(n-7) + a(n-4) + a(n-1) for n>1 and a(n)=1 for n<=1.at n=28A262602
• Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=5A316233
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=5A316237
• Triangle read by rows: T(n,k) is the number of binary rooted trees with n leaves of exactly k colors and all non-leaf nodes having out-degree 2.at n=25A319541
• Numbers k such that A360327(k) > 2*k.at n=5A360328