G.f. = b(2)*b(6)*b(10)/(x^15+x^14+x^13+x^12+x^11-2*x^5-x^4-x^3-x^2-x+1), where b(k) = (1-x^k)/(1-x).
A266373
G.f. = b(2)*b(6)*b(10)/(x^15+x^14+x^13+x^12+x^11-2*x^5-x^4-x^3-x^2-x+1), where b(k) = (1-x^k)/(1-x).
Terms
- a(0) =1a(1) =4a(2) =10a(3) =22a(4) =46a(5) =95a(6) =193a(7) =388a(8) =778a(9) =1558a(10) =3118a(11) =6236a(12) =12468a(13) =24926a(14) =49830a(15) =99614a(16) =199133a(17) =398073a(18) =795758a(19) =1590738a(20) =3179918a(21) =6356718a(22) =12707200a(23) =25401932a(24) =50778938a(25) =101508046a(26) =202916478a(27) =405633823a(28) =810869573a(29) =1620943388
External references
- oeis: A266373