-1675

Appears in sequences

• a(n) = 8^n - n^7.at n=3A024095
• Sum at 45 degrees to horizontal in triangle of A081498.at n=48A081499
• Irregular array read by rows in which row n lists the integers k, in ascending order, for which there is a primitive cycle of n positive integers under iteration by the Collatz-like 3x+k function.at n=35A226619
• Expansion of (1 - 2*x^2)/(1 + x)^4. Third column of Riordan triangle A248156.at n=24A248159
• G.f. A(x) satisfies: A(x) = A(x^3 - x^5)/x^2.at n=21A350479