2480058

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*9^j.at n=26A038275
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*7^j.at n=22A038297
• Number of ternary trees (A001764) with n nodes and maximal diameter.at n=12A064017
• Look at all numbers formed by multiplying the parts in a partition of n; a(n) = maximal such number which is divisible by n.at n=41A069188
• Number of meaningful differential operations of the n-th order on the space R^8.at n=23A090993
• a(n) = 9^n*Catalan(n).at n=5A156273
• Number of trees over all forests of labeled rooted trees in which some (possibly all or none) of the trees have been specially designated.at n=7A225573
• Nonprimes k such that sopfr(k) = rad(k), where sopfr(k) is sum of the prime factors of k (counting multiplicity), and rad(k) is the product of its distinct prime factors.at n=26A386916