135125

Appears in sequences

• Numbers k such that 203*2^k + 1 is prime.at n=22A032478
• a(n) = 1 + 4*n*(1 + 2*n^2)/3.at n=37A171272
• L.g.f.: Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - n*x^d/d).at n=10A198305
• Number of nX6 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A302633