Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 7.

A242505

Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 7.

Terms

    a(0) =1a(1) =0a(2) =7a(3) =9a(4) =28a(5) =81a(6) =139a(7) =405a(8) =815a(9) =1771a(10) =4092a(11) =8173a(12) =18019a(13) =37609a(14) =77246a(15) =163345a(16) =331968a(17) =683631a(18) =1400777a(19) =2832362a(20) =5770056a(21) =11640546a(22) =23446366a(23) =47227530a(24) =94582628a(25) =189487950a(26) =378658714a(27) =754877809a(28) =1504215522a(29) =2990469337

External references