22800

Appears in sequences

• Expansion of (1-x)^(-3) * (1-x^2)^(-2).at n=35A002624
• a(n) = n*(n+1)*(n+2)^2/6.at n=18A004320
• a(n) = floor( n*(n-1)*(n-2)*(n-3)/25 ).at n=29A011935
• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 1 (mod 3).at n=53A035537
• Expansion of 1/(1-2*x-2*x^3).at n=12A052912
• McKay-Thompson series of class 25A for Monster.at n=31A058594
• Number of rods required to make a 3-D cube of side length n.at n=19A059986
• Numbers k such that sigma (x) = k has exactly 11 solutions.at n=27A060678
• a(0)=1, a(n) = 8*n*(2*n-1).at n=38A067239
• Number of permutations on n letters that have only cycles of length 5 or less.at n=8A070946
• a(n) = (prime(n)-1)*(prime(n)+1).at n=35A084920
• Indices of primes in sequence defined by A(0) = 53, A(n) = 10*A(n-1) - 7 for n > 0.at n=17A101574
• a(n) = binomial(n+2,2)*binomial(n+6,2).at n=14A104473
• Column 1 of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1 + x - x^2)^n.at n=15A104506
• Partial sums of cupolar numbers (1/3)*(n+1)*(5*n^2+7*n+3) (A096000).at n=14A117066
• Triangle read by rows, the Bell transform of Product_{k=0..n} 7*k+1 without column 0.at n=11A132056
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.at n=9A148981
• Eight times hexagonal numbers: a(n) = 8*n*(2*n-1).at n=38A152750
• Number of subsets S of {1,2,3,...,n} with the property that if x is a member of S then at least one of x-2 and x+2 is also a member of S.at n=18A172020
• Triangle T such that row n of T^n = row n of (I+D)^(n^2) where D is the lower diagonal matrix: D(n+1,n)=n+1, and I is the identity matrix.at n=24A173210