41107

Appears in sequences

• a(n) = floor(n*(n-1)*(n-2)*(n-3)/16).at n=30A011926
• Triangle of q-binomial coefficients for q=-6.at n=17A015116
• Triangle of q-binomial coefficients for q=-6.at n=18A015116
• Gaussian binomial coefficient [ n,2 ] for q = -6.at n=3A015257
• Gaussian binomial coefficient [ n,3 ] for q=-6.at n=2A015273
• Number of bracelets (turnover necklaces) of n beads of 2 colors, 9 of them black.at n=16A032281
• Convolution of odd primes with themselves.at n=26A084370
• G.f.: exp( Sum_{n>=1} (x^n/n) * Product_{d|n} (1 + d*x^n) ).at n=45A205478
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=7A316443
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=47A316448
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=52A316448