24190

Appears in sequences

• Divide natural numbers in groups with prime(n) elements and add together.at n=16A034957
• G.f.: ( 1 + x + x^2 - x^3 - x^4 - sqrt( 1 - 2 x - 5 x^2 - 4 x^3 - 3 x^4 - 4 x^5 - x^6 + 2 x^7 + x^8 ) ) / ( 2 x (1 + x) ).at n=11A050262
• Area under Dyck paths.at n=10A057571
• a(n) = 1 + Sum(prime(i)*(2*i-1): 1<=i<=n).at n=21A083215
• Number of compositions (ordered partitions) of n into powers of 4.at n=33A087221
• G.f. satisfies A(x) = 1 + x*A(x)*f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).at n=11A087222
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 62", based on the 5-celled von Neumann neighborhood.at n=39A270081
• Number T(n,k) of set partitions of [n] such that k is the largest element of the last block; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=60A271466
• Number of set partitions of [2n+1] such that n+1 is the largest element of the last block.at n=5A271607
• Number of set partitions of [n] such that 6 is the largest element of the last block.at n=5A271745
• Number of set partitions of [n+5] such that n is the largest element of the last block.at n=5A271756
• Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^9 = 1 >.at n=30A298811
• Partial sums of the Dedekind psi_2(k) function, for 1 <= k <= n.at n=39A321973
• G.f. B(x) satisfies: B(x) = (1 - x^2*B(x)^2)*(1 + 2*x*B(x)) / (1 - 2*x*B(x))^3.at n=4A341965