23976

Appears in sequences

• Pentagonal pyramidal numbers: a(n) = n^2*(n+1)/2.at n=36A002411
• Even pentagonal pyramidal numbers.at n=27A015224
• a(n) = T(n, 2*n-6), T given by A027960.at n=14A027968
• The second of the three sequences associated with the polynomial x^3 - 2.at n=14A052102
• Number of step shifted (decimated) sequences using a maximum of six different symbols.at n=5A056375
• Term at which first number of height n occurs in Recamán's sequence A005132.at n=20A064292
• Trajectory of 775 under the Reverse and Add! operation carried out in base 2, written in base 10.at n=5A077077
• a(n) = 4n^3 + 2n^2.at n=17A089207
• Number of labeled rooted 2,3 cacti (triangular cacti with bridges).at n=5A091481
• Square array a(m,n) read by antidiagonals, defined by A000010(n)*a(m,n) = Sum_{k=1..n, gcd(k,n)=1} m^{ Sum_{d|n} A000010(d)/ (multiplicative order of k modulo d) }.at n=60A132191
• Union of A052103, A052102 and A052101, uniqued and sorted.at n=34A140495
• The sum of all the entries in an n X n Cayley table for multiplication in Z_n.at n=36A160255
• Numbers which can be expressed as the product of numbers made of only sixs.at n=14A161144
• a(n) = binomial(n+1,2)*6^2.at n=36A162940
• Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^5 = I.at n=9A163315
• a(n) = n^4*(n^2 + 1)/2.at n=6A168192
• Numbers of the form p^4*q^3*r where p, q, and r are distinct primes.at n=29A179698
• Number of different ways to select 6 disjoint subsets from {1..n} with equal element sum.at n=8A196233
• 40-gonal numbers: a(n) = 38*n*(n-1)/2 + n.at n=36A261191
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 225", based on the 5-celled von Neumann neighborhood.at n=17A279990