"Self-Lucas"; a(n) is the sum of the last 5 terms. Sequence starts with 12,21,3,1,19 which are l,u,c,a,s if you consider a=1, b=2, c=3, ..., z=26.

A129939

"Self-Lucas"; a(n) is the sum of the last 5 terms. Sequence starts with 12,21,3,1,19 which are l,u,c,a,s if you consider a=1, b=2, c=3, ..., z=26.

Terms

    a(0) =12a(1) =21a(2) =3a(3) =1a(4) =19a(5) =56a(6) =100a(7) =179a(8) =355a(9) =709a(10) =1399a(11) =2742a(12) =5384a(13) =10589a(14) =20823a(15) =40937a(16) =80475a(17) =158208a(18) =311032a(19) =611475a(20) =1202127a(21) =2363317a(22) =4646159a(23) =9134110a(24) =17957188a(25) =35302901a(26) =69403675a(27) =136444033a(28) =268241907a(29) =527349704

External references