Expansion of (1+6x)/(1-12x^2).

Terms

a(0) =1a(1) =6a(2) =12a(3) =72a(4) =144a(5) =864a(6) =1728a(7) =10368a(8) =20736a(9) =124416a(10) =248832a(11) =1492992a(12) =2985984a(13) =17915904a(14) =35831808a(15) =214990848a(16) =429981696a(17) =2579890176a(18) =5159780352a(19) =30958682112a(20) =61917364224a(21) =371504185344a(22) =743008370688