20763

Appears in sequences

• Sum of rows of triangle defined in A001404.at n=12A001410
• Coefficients of the '2nd-order' mock theta function A(q).at n=39A006304
• Matrix square of triangle A063967.at n=50A091700
• Numbers n such that 3*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=6A102965
• Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 5 with the steps (1,0), (0, 1), (2,0) and (0,2).at n=7A127619
• Generalized (3,-1) Catalan numbers.at n=17A144700
• a(n) = (3*n^5 - 35*n^4 + 145*n^3 - 235*n^2 + 152*n + 30)/30.at n=14A161704
• Number of partitions of n such that neither floor(n/2) nor ceiling(n/2) is a part.at n=36A238623
• Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north, northeast or northwest neighbor modulo 3 and the upper left element equal to 0.at n=10A266887
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any north, northeast or northwest neighbors modulo n and the upper left element equal to 0.at n=80A267264