143289

Appears in sequences

• Expansion of 1/(1 - x*Product_{k>=1} (1 + x^k)/(1 - x^k)).at n=12A299108
• Positive integers k such that (k+1)^4 has a divisor congruent to -1 modulo k.at n=51A350916
• a(0) = 9, a(1) = 9, and a(n) = 3*a(n-1) - a(n-2) - 4 for n >= 2.at n=12A350919