154946

Appears in sequences

• a(n) = a(n-1) + a(n-3) + a(n-4), n >= 4, with initial terms -1,3,2,1.at n=26A111572
• Expansion of (2-x+x^2)/((1+x)*(1-3*x+x^2)).at n=12A248161
• Sphenic numbers that are sandwiched between products of exactly 4 distinct primes (or tetraprimes).at n=16A375908