Self-convolution of Lucas numbers.

Terms

a(0) =4a(1) =4a(2) =13a(3) =22a(4) =45a(5) =82a(6) =152a(7) =274a(8) =491a(9) =870a(10) =1531a(11) =2676a(12) =4652a(13) =8048a(14) =13865a(15) =23798a(16) =40713a(17) =69446a(18) =118144a(19) =200510a(20) =339559a(21) =573894a(22) =968183a(23) =1630632a(24) =2742100a(25) =4604572a(26) =7721797a(27) =12933334a(28) =21637221a(29) =36159610