29682

Appears in sequences

• Number of n X n symmetric binary matrices containing no more than one 1 in any 3 X 3 sub-block.at n=10A139009
• Sixth derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.at n=19A215836
• Triangle T(n,k) in which n-th row lists the values of the n-th derivative at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways; n>=1, 1<=k<=A000081(n).at n=19A216349
• Triangle T(n,k) in which n-th row lists in increasing order the values of the n-th derivative at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways; n>=1, 1<=k<=A000081(n).at n=31A216350
• G.f.: A(x,y) = Sum_{n>=0} n! * x^n*y^n * Product_{k=1..n} (1 + k*x) / (1 + k*x*y + k^2*x^2*y).at n=63A221971
• Number of partitions of n such that the (sum of distinct even parts) > n/2.at n=48A284618
• Number of partitions of n such that the (sum of distinct even parts) >= n/2.at n=48A284619
• Numbers n such that both phi(n) and psi(n) are perfect squares.at n=37A291549
• Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.at n=5A299356
• Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.at n=4A299357
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.at n=49A299359
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.at n=50A299359
• Number of partitions of n into an even number of parts that are not multiples of 4.at n=51A339406
• Numbers k such that the sum of the numbers from 1 to k and that from 1 to k+1 share the same sum of divisors.at n=20A375819