Powers of cube root of 13 rounded up.

Terms

a(0) =1a(1) =3a(2) =6a(3) =13a(4) =31a(5) =72a(6) =169a(7) =398a(8) =935a(9) =2197a(10) =5166a(11) =12147a(12) =28561a(13) =67157a(14) =157908a(15) =371293a(16) =873035a(17) =2052796a(18) =4826809a(19) =11349444a(20) =26686341a(21) =62748517a(22) =147542765a(23) =346922421a(24) =815730721a(25) =1918055941a(26) =4509991466a(27) =10604499373a(28) =24934727222a(29) =58629889046