129031

Appears in sequences

• Counts where both the odd composites (starting from 1) 1 mod 4 and 3 mod 4 are equal.at n=27A093182
• G.f. (4*x+3)/(2*(x+1))*(1+1/sqrt(-4*x^4-4*x^3+1)).at n=23A247169
• Sum of the legs of the unique primitive Pythagorean triple whose inradius is A000217(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=22A383834