67032

Appears in sequences

• A generalized difference set on the set of all integers (lambda = 1).at n=26A024431
• Number of nonroot branch nodes in all noncrossing rooted trees on n nodes on a circle.at n=7A045737
• a(n) = n*(n+1)*(n+2)*(n+3)*(3*n+2)/120.at n=18A051836
• a(n) = Sum_{k=1..n, gcd(n,k) = 1} k^3.at n=27A053819
• a(1) = 1. a(n) = a(n-1) + a(m), where m is the largest term of the sequence {a(k)} which is less than n.at n=38A133488
• Symmetrical Hahn weights on q-form factorials:m=2;q=3; q-form:t(n,m)=If[m == 0, n!, Product[Sum[(m + 1)^i, {i, 0, k - 1}], {k, 1, n}]]; Hahn weight:b(n,k,m)=If[n == 0, 1, (n!*t[m + 1, k]*t[m + 1, n - k])/(k!*(n - k)!*t[1, n])].at n=29A157321
• Symmetrical Hahn weights on q-form factorials:m=2;q=3; q-form:t(n,m)=If[m == 0, n!, Product[Sum[(m + 1)^i, {i, 0, k - 1}], {k, 1, n}]]; Hahn weight:b(n,k,m)=If[n == 0, 1, (n!*t[m + 1, k]*t[m + 1, n - k])/(k!*(n - k)!*t[1, n])].at n=34A157321
• Numbers with prime factorization p*q^2*r^2*s^3 (where p, q, r, s are distinct primes).at n=31A190109
• Molecular topological indices of the crossed prism graphs.at n=13A192793
• Nonsquare numbers whose sum of proper square divisors is a square greater than 1.at n=23A232555
• Numbers whose sum of proper square divisors is a square greater than 1.at n=26A232556
• Sum of the divisors of A000073(n) (tribonacci numbers).at n=18A366783
• Number of permutations of 0..n-1 which are binary Gray codes.at n=17A385185