Pentanacci numbers: a(n)=a(n-1)+a(n-2)+a(n-3)+a(n-4)+a(n-5), {1,2,3,4,5...}.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =15a(6) =29a(7) =56a(8) =109a(9) =214a(10) =423a(11) =831a(12) =1633a(13) =3210a(14) =6311a(15) =12408a(16) =24393a(17) =47955a(18) =94277a(19) =185344a(20) =364377a(21) =716346a(22) =1408299a(23) =2768643a(24) =5443009a(25) =10700674a(26) =21036971a(27) =41357596a(28) =81306893a(29) =159845143