1261260

Appears in sequences

• Coefficients for extrapolation.at n=6A002738
• a(n) = 21*(n+1)*binomial(n+4,9).at n=6A027805
• a(n) = 42*(n+1)*binomial(n+6,10).at n=5A027822
• Reduced denominators of the (2n-1)th raw moment of the distribution of line lengths of points picked at random in a unit square.at n=5A103305
• Numbers with exactly 6 distinct prime divisors {2,3,5,7,11,13}.at n=32A147573
• Numbers with prime factorization pqrs^2t^2u^2.at n=2A190391
• a(1)=2, a(n) = (4n/3)*(2n-1)!! (see A001147) for n>1.at n=6A208124
• Average of twin prime pairs n having their decimal expansion of the form abcabc or abcabc0 such that n contains three twin primes as divisors.at n=10A235716
• Numerator of the harmonic mean of the first n hexagonal numbers.at n=6A250344
• Triangle read by rows in which the n-th row lists the multinomials A036038 for all partitions of 2n with only even parts in Abramowitz-Stegun ordering.at n=38A257468
• Number of set partitions of [n] with minimal block length multiplicity equal to four.at n=10A271764
• Ordered set partitions of the set {1, 2, ..., 3*n} with all block sizes divisible by 3, irregular triangle T(n, k) for n >= 0 and 0 <= k < A000041(n), read by rows.at n=16A327023
• Triangle read by rows: T(n,k) = (-1)^(n+k)*(n+k+1)*binomial(n,k)*binomial(n+k,k) for n >= k >= 0.at n=42A331431
• Least integer with n pentagonal divisors.at n=14A356132
• Numbers that occur exactly 4 times in A036038, i.e., numbers m such that the multinomial coefficient (x_1 + ... + x_k)!/(x_1! * ... * x_k!) is equal to m for exactly 4 integer partitions (x_1, ..., x_k).at n=28A376374
• Triangle read by rows: T(n,k) is the number of 4-dimensional balanced ballot paths of 4n steps such that the height is exactly k, 3 <= k <= 3*n.at n=48A387987