2072070

Appears in sequences

• a(n) = (2/(3*n-1))*binomial(3*n,n).at n=10A024485
• a(n) = binomial(n+6,6)*(2n+7)/7.at n=21A050486
• Eighth column (m=7) of (1,4)-Pascal triangle A095666.at n=21A095670
• Indices of Bernoulli numbers of the form 4k+2 whose fractional part is < 2/3.at n=0A155125
• Indices of Bernoulli numbers of the form 4k+2 whose fractional part is < 2/3 and is incrementally smallest.at n=0A155126
• Numbers with prime factorization pqrstuv^2.at n=11A190381
• Irregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.at n=47A219731
• Least positive integer k with exactly n odd divisors greater than sqrt(2*k).at n=40A281008
• Totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s(n) is the sum of iterated phi(n) (A092693).at n=17A291173
• Numbers k such that A383546(k) > A383546(m) for all m < k.at n=20A383547