151875

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTT = ZSM-23 Nan[AlnSi24-nO48] starting with a T2 atom.at n=15A019187
• Numbers whose prime factors are 3 and 5.at n=31A033849
• a(n) = 3^n*n^(n-1).at n=4A038061
• Odd numbers divisible by exactly 9 primes (counted with multiplicity).at n=15A046322
• a(n) = A061680(n!).at n=51A069785
• a(n) = A061680(n!).at n=52A069785
• A modular recurrence.at n=9A100747
• Powerful(1) numbers (A001694) whose digit reversal is a pentagonal number (A000326).at n=15A115695
• Numbers of the form p^4*q^5 where p and q are two distinct primes.at n=5A179702
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and positive odd determinant.at n=29A210373
• Number of 2 X 2 matrices having all terms in {1,...,n} and positive odd determinant.at n=29A211068
• Number of (u,v,w,x,y,z) with all terms in {0,1,...,n} and 5u=v+w+x+y+z.at n=14A212242
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>=2z.at n=30A212505
• a(n) = 3*n^4.at n=15A219056
• 4-full numbers that are not prime powers.at n=30A372841
• a(n) = 3^n*n^4.at n=5A387251
• Quartic-full (4-full) Achilles numbers.at n=17A391011
• a(n) = Sum_{k=0..floor(n/4)} (k+1) * 2^k * 3^(n-3*k) * binomial(n-2*k,k) * binomial(n-3*k,k).at n=9A391985