Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 9.

A242507

Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 9.

Terms

    a(0) =1a(1) =0a(2) =9a(3) =11a(4) =45a(5) =121a(6) =243a(7) =726a(8) =1509a(9) =3601a(10) =8385a(11) =17836a(12) =40873a(13) =87633a(14) =188855a(15) =409116a(16) =859674a(17) =1827160a(18) =3832786a(19) =7981398a(20) =16644666a(21) =34362355a(22) =70866846a(23) =145637147a(24) =297814569a(25) =608309130a(26) =1237764177a(27) =2512564769a(28) =5090761029a(29) =10286177231

External references