369370

Appears in sequences

• Even pseudoprimes to base 31.at n=13A130440
• Even pseudoprimes to base 41.at n=14A130442
• Triangular numbers obtained as the concatenation of n and n+1.at n=5A226788
• Expansion of x^2*(10-5*x+x^2)/((1-x)^4*(1-x^2)).at n=40A331429
• Semiperimeter of the unique primitive Pythagorean triple whose inradius is A000108(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=7A382114