205920

Appears in sequences

• a(n) = 4*(2n+1)!/n!^2.at n=7A002011
• Degrees of irreducible representations of Fischer group Fi22.at n=24A003913
• a(n+1) = a(n)/n if n|a(n) else a(n)*n, a(1) = 1.at n=16A008336
• a(n) = a(n-1) + 7*a(n-2), a(0)=0, a(1)=1.at n=12A015442
• a(n) = (n+1)*binomial(n+1,8).at n=8A027768
• Number of symmetric nonnegative integer 8 X 8 matrices with sum of elements equal to 4*n, under action of dihedral group D_4.at n=18A054498
• Number of ways of getting 5 of a kind, a straight flush, 4 of a kind, full house, flush, straight, 2 pair, 3 of a kind, a pair in wild-card poker with 1 joker.at n=6A057801
• Triangle read by rows: T(n,k)=(1/2)*C(n+k,k)*C(n,n-k).at n=42A092370
• Triangle read by rows: T(n, k) = binomial(n, k) * binomial(n+k, n-k).at n=47A092371
• a(n) = binomial(n+7,7) * binomial(n+10,7).at n=3A105943
• a(n) = binomial(n+3,3)*binomial(n+6,6).at n=7A107418
• Sigma(A033631(n)) {sigma is the sum of divisors function A000203}.at n=23A115619
• a(n) = A143176(n)/n.at n=41A143177
• Sum of squared terms in rows of triangle A152547: a(n) = Sum_{k=0..C(n,[n/2])-1} A152547(n,k)^2.at n=15A152548
• a(n) = 2^A006218(n)/( (n!)^2*Sum_{m=0..n} 1/(m!*(2*n-m+1)!) ).at n=7A178345
• 1/32 the number of (2n+1) X (2n+1) binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1.at n=1A183765
• 1/32 the number of (n+1) X 5 binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1.at n=3A183767
• T(n,k) = 1/32 the number of (n+1) X (k+1) binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1.at n=24A183772
• a(n) = C(2n,n) * (8^n/n!^2) * Product_{k=0..n-1} (8k+3)*(8k+5).at n=2A184888
• Triangle S(n, k) by rows: coefficients of 2^((n-1)/2)*(x^(1/2)*d/dx)^n when n is odd, and of 2^(n/2)*(x^(1/2)*d/dx)^n when n is even.at n=51A223168