29260

Appears in sequences

• a(n) = 1^2 + 3^2 + 5^2 + 7^2 + ... + (2*n-1)^2 = n*(4*n^2 - 1)/3.at n=28A000447
• Dodecahedral numbers: a(n) = n*(3*n - 1)*(3*n - 2)/2.at n=19A006566
• Even tetrahedral numbers.at n=41A015220
• Binomial coefficients C(n,54).at n=3A017718
• Binomial coefficients C(57,n).at n=3A017773
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 18.at n=18A031696
• a(n) = n*(n+1)*(n+2)*(n+3)/6.at n=19A033488
• Values of C(n,3) which can be written as C(x,3) + C(y,3).at n=2A034404
• Denominators of column 2 of table described in A051714/A051715.at n=18A051719
• Number of (3,n)-partitions of a chain of length n^2.at n=8A055658
• Expansion of (1-x)^(-1)/(1-x+2*x^2+2*x^3).at n=19A077878
• Riordan array [(1-x)exp(x/(1-x)),x].at n=38A152151
• Tetrahedral numbers n*(n+1)*(n+2)/6 with n, n+1 and n+2 nonprime.at n=15A152622
• a(n) = period of the sequence [ x(k+1) := floor(2*cos(2*Pi/7)*x(k)) - x(k-1), with x(0) := cosh(n)^2, x(1) := sinh(n)^2 ].at n=26A154411
• Sequence related to Hankel transform of super-ballot numbers.at n=26A156126
• a(n) = 2662*n - 22.at n=10A157609
• a(n) = 361*n^2 + 19.at n=9A158592
• Number of n X 6 binary arrays without the pattern 0 1 diagonally or vertically.at n=8A188840
• a(n) = 4*a(n-1) + 39*a(n-2), with a(0)=0, a(1)=1.at n=6A190441
• The number of inequivalent ways to color the vertices of a regular octahedron using at most n colors.at n=9A198833