321489

Appears in sequences

• a(n) = (F(n+1)+L(n)+n)^2 where F(n) are the Fibonacci numbers (A000045) and L(n) are the Lucas numbers (A000032).at n=12A014718
• Numbers of form 7^i*9^j, with i, j >= 0.at n=25A025631
• Numbers whose prime factors are 3 and 7.at n=28A033850
• Odd numbers divisible by exactly 10 primes (counted with multiplicity).at n=8A046323
• n is odd and divisible by number of divisors of n and sum of digits of n.at n=13A057530
• Numbers n such that n and n^(1/2) combined use different digits.at n=19A059931
• a(n) is the greatest common divisor of (n-1)! and n^n.at n=20A062763
• Smallest square beginning with the reverse concatenation of first n natural numbers.at n=2A077731
• 9th binomial transform of (1,8,0,0,0,0,0,0,.....).at n=5A081044
• a(n) = 3^n*(n^3 - 3*n^2 + 2*n + 162)/162.at n=10A081914
• Squares for which both the sum of the digits and the product of the digits are cubes.at n=14A117687
• Numbers of the form p^8*q^2 where p and q are distinct primes.at n=12A179699
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically.at n=11A207725
• Number of 5Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=7A207951
• Fixed points of A225546.at n=43A225547
• Numbers of the form prime(i)^2^(i-1) or prime(i)^2^(j-1)*prime(j)^2^(i-1) with i and j distinct integers.at n=7A225548
• Squares which have one or more occurrences of exactly six different digits.at n=30A235721
• Odd half-Zumkeller numbers.at n=34A246199
• a(n) = numerator of Product_{d|n} (sigma(d)/d) where sigma(k) = the sum of the divisors of k (A000203).at n=39A322673
• Hankel transform of the ruler function A001511.at n=29A334910