23786

Appears in sequences

• Numbers k such that 223*2^k+1 is prime.at n=27A032488
• a(n) = (2*n^3 + 5*n^2 - 9*n)/2.at n=27A162258
• Partial sums of A079062.at n=40A177455
• Number of ways of writing n as the sum of 7 triangular numbers.at n=48A226252
• Numbers k such that 5*R_k + 7*10^k + 2 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=14A259132
• Poincaré series for hyperbolic reflection group with Coxeter diagram o-(4)-o---o-(5)-o.at n=24A265047
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 446", based on the 5-celled von Neumann neighborhood.at n=36A272250