91080

Appears in sequences

• Coefficient of x^5 in expansion of (1 + x + x^2)^n.at n=21A000574
• Number of irreducible positions of size n in Montreal solitaire.at n=12A007048
• Reduced denominators of the coefficients in a series expansion for Gamma[x].at n=20A054380
• Product of composite numbers between the n-th and (n+1)st primes.at n=13A061214
• a(n) = (2*n+2)*(2*n+3)*(2*n+4) = 24*A000330(n+1).at n=21A069074
• One half of A075178.at n=21A075179
• a(n) = (3*n-1) * 3*n * (3*n+1).at n=14A097321
• Product of all composite numbers k such that n<k<prime(r) where prime(r-1)<=n, or 1 if this set of k is empty.at n=42A109915
• a(1) = 1, then product of consecutive composite numbers sandwiched between primes.at n=28A109919
• Weight distribution of quadratic residue code of length 23 over GF(3).at n=15A112641
• a(n) = denominator of the sum of reciprocals of the terms in n-th row of triangle A126571.at n=7A126576
• Numbers with prime factorization p*q*r*s^2*t^3 (where p, q, r, s, t are distinct primes).at n=26A190111
• Integer areas A of integer-sided triangles such that the length of the circumradius is a prime number.at n=34A256629
• Number of n X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.at n=10A265986
• a(n) = n*(2*n+1)*binomial(n+2,n)/3.at n=22A289643
• a(n)/2^n is the expected value of the length of the longest palindromic suffix of a random length-n binary string.at n=13A320303