-653

Appears in sequences

• Matrix inverse of triangle A063967.at n=51A091698
• Number of partitions of n with even crank minus number of partitions of n with odd crank.at n=51A124226
• Expansion of phi(-x) * chi(-x) in powers of x where phi(), chi() are Ramanujan theta functions.at n=51A132970
• a(n) = Sum_{d|n} (-1)^(d-1) * d^(n/d-1).at n=19A359812