Number of compositions of n with cuts-resistance <= 2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =13a(6) =23a(7) =45a(8) =86a(9) =159a(10) =303a(11) =568a(12) =1069a(13) =2005a(14) =3769a(15) =7066a(16) =13251a(17) =24821a(18) =46482a(19) =86988a(20) =162758