48547

Appears in sequences

• Numbers n such that 4*10^n + 3*R_n + 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=30A102989
• Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.at n=20A265994
• Product_{n>=1} (1 + x^n)^a(n) = 1 + Sum_{n>=1} sigma(n) * x^n, where sigma = A000203.at n=54A328776