Number of compositions of n with difference 1 between the number of odd parts and the number of even parts, both counted without multiplicity.

A242841

Number of compositions of n with difference 1 between the number of odd parts and the number of even parts, both counted without multiplicity.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =8a(6) =14a(7) =45a(8) =99a(9) =230a(10) =451a(11) =953a(12) =1798a(13) =3503a(14) =6683a(15) =12693a(16) =24209a(17) =46155a(18) =89200a(19) =172767a(20) =338255a(21) =664453a(22) =1317945a(23) =2620363a(24) =5243700a(25) =10509348a(26) =21141700a(27) =42578221a(28) =85897588a(29) =173380086

External references