Partial sums of pentanacci numbers (A000322).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =10a(6) =19a(7) =36a(8) =69a(9) =134a(10) =263a(11) =516a(12) =1013a(13) =1990a(14) =3911a(15) =7688a(16) =15113a(17) =29710a(18) =58407a(19) =114824a(20) =225737a(21) =443786a(22) =872459a(23) =1715208a(24) =3372009a(25) =6629194a(26) =13032651a(27) =25621516a(28) =50370573a(29) =99025938