-2699

Appears in sequences

• Expansion of 1/(-x^11 + x^10 + 2*x^7 - x^6 - x^5 - x^4 - x^2 + 2*x + 1).at n=9A157748
• Expansion of e.g.f. exp(x/(1 + 2*x)).at n=6A318223
• a(1) = 1, then subtract, multiply, and add 2, 3, 4; 5, 6, 7; ... in that order.at n=12A362270
• Expansion of 1/sqrt((1 - x + x^4)^2 + 4*x^5).at n=18A375293