Number of compositions of 5*n into parts 3 and 5.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =7a(5) =22a(6) =58a(7) =138a(8) =319a(9) =750a(10) =1810a(11) =4427a(12) =10828a(13) =26349a(14) =63862a(15) =154603a(16) =374521a(17) =908140a(18) =2203162a(19) =5344988a(20) =12964858a(21) =31443013a(22) =76253683a(23) =184929945a(24) =448506736a(25) =1087774536a(26) =2638209313a(27) =6398479259a(28) =15518219326a(29) =37636240539