-3021

Appears in sequences

• Alternating row sums of triangle A049352 (S1p(4)).at n=5A134137
• Expansion of Product_{k>=1} (1 + x^(4*k))^(4*k) / (1 + x^k)^k.at n=25A285295
• a(n) = Sum_{k=0..n} (-1)^k * 2^k * q(k), where q(k) is A000009 (partitions into distinct parts).at n=9A293465