48510

Appears in sequences

• a(n) = n^2*(n^2 - 1)/4.at n=21A006011
• a(n) = (1/4)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2)*floor((n-3)/2).at n=44A028723
• Layer counting sequence for hyperbolic tessellation by regular heptagons of angle Pi/3.at n=6A054890
• Triangular array for David G. Cantor's sigma function.at n=33A055068
• Triangular array for David G. Cantor's sigma function.at n=35A055068
• a(n) = Product_{2i<n} binomial(2*n-2*i-1, 2*i).at n=7A073306
• a(n) is the number of cubes with at most n digits and first digit 1.at n=15A083380
• McKay-Thompson series of class 9b for the Monster group.at n=32A112146
• a(n) = 22 + floor( Sum_{j=1..n-1} a(j)/2 ).at n=19A120146
• Numbers with exactly 5 distinct prime divisors {2,3,5,7,11}.at n=17A147572
• a(n) = 7*A000330(n).at n=27A169607
• Smallest number which is an unordered sum of two odd abundant numbers in exactly n ways.at n=36A187743
• Numbers with prime factorization pqrs^2t^2.at n=26A189989
• Number of (w,x,y,z) with all terms in {0,...,n}, w even and x odd.at n=20A212766
• Pentagonal numbers which are the arithmetic mean of two consecutive primes.at n=22A234531
• Number of length n+1 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=18A255108
• Positive pentagonal numbers (A000326) that are triangular numbers (A000217) divided by 2.at n=1A259161
• Irregular triangle read by rows: T(n,k) = number of signed unichromosonal genomes with n genes at 3-break distance k from a fixed genome, 0 <= k <= floor(n/2).at n=26A264615
• Partial sums of A140091.at n=44A267370
• Values of m such that m^2 + 6 is a triangular number (A000217).at n=18A276600