21960

Appears in sequences

• Weight enumerator of [ 40,19,10 ] shortened QR code.at n=13A030645
• Number of sublattices of index n in generic 4-dimensional lattice.at n=21A038991
• First differences of A069475, successive differences of (n+1)^6-n^6.at n=28A069476
• Smallest number having exactly n divisors that are not greater than the number's greatest prime factor.at n=19A087134
• a(0)=360, a(n)=a(n-1)+720 for n>=1.at n=30A140801
• Terms of A024670 that are not in A141805.at n=25A141806
• Sum of the squares of the first n Fibonacci numbers with index divisible by 3.at n=4A156084
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 5.at n=21A160891
• Number of ways to partition a 5*n X 2 grid into 5 connected equal-area regions.at n=8A167239
• Sum of divisors of cubes.at n=21A175926
• Number of nondecreasing arrangements of 4 numbers in -(n+2)..(n+2) with sum zero and not more than two numbers equal.at n=42A188237
• a(n) = n*(14*n - 11).at n=40A195021
• a(n) = (n-2)*(14*n-39) for n > 2, otherwise a(n) = n.at n=42A195030
• Number of 7 X (n+1) 0..1 arrays with every 2 X 2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..1 introduced in row major order.at n=11A208088
• G.f.: Product_{k>=1} (1 + x^k) / (1 - x^(k^3)).at n=44A280277
• Number of 5-cycles in the n-polygon diagonal intersection graph.at n=27A300553
• The sum of divisors of the smallest cubefull number that is a multiple of n.at n=21A369720
• The sum of divisors of the smallest cubefull number that is a multiple of n.at n=43A369720
• The sum of divisors of the smallest cubefull exponentially odd number that is divisible by n.at n=21A369758
• The sum of divisors of the smallest cubefull exponentially odd number that is divisible by n.at n=43A369758