18798

Appears in sequences

• Coordination sequence for Cr3Si, Cr position.at n=35A009928
• Expansion of (1+x^3*C^2)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=9A071731
• Triangle of numbers arising in recursive computation of A002212.at n=42A073149
• n-th positive integer whose digits sum up to n.at n=32A081927
• Numbers k such that the Reverse and Add! trajectory of k (presumably) does not reach a palindrome (with the exception of k itself) and does not join the trajectory of any term m < k.at n=41A088753
• Numbers n such that A001414(n) = sum of squared digits of n.at n=35A094908
• Numbers k such that 2*10^k + 5*R_k - 4 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=9A098930
• Triangle read by rows: T(n,k) is the number of ternary words of length n containing k 012's (n >= 0, 0 <= k <= floor(n/3)).at n=32A119851
• a(n) = 12 + floor((1 + Sum_{j=1..n-1} a(j))/4).at n=33A120169
• Integer part of Gauss's Arithmetic-Geometric Mean M(1,n^4).at n=19A127760
• n-th zerofree positive number with digital sum n.at n=32A181178
• Left edge of the triangle in A033291.at n=38A192735
• Numbers n such that sum of squares of digits of n equals the sum of prime divisors of n.at n=40A217390
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 94", based on the 5-celled von Neumann neighborhood.at n=39A270135
• Number of integers in n-th generation of tree T(2/3) defined in Comments.at n=38A274145
• Numbers k such that the Reverse and Add! trajectory of k (presumably) does not reach a palindrome and does not join the trajectory or one of the reverse numbers of the trajectory of any term m < k.at n=40A306232