a(n) = 7*a(n-1) - 14*a(n-2) + 7*a(n-3) with a(0)=0, a(1)=7, a(2)=35.
A215510
a(n) = 7*a(n-1) - 14*a(n-2) + 7*a(n-3) with a(0)=0, a(1)=7, a(2)=35.
Terms
- a(0) =0a(1) =7a(2) =35a(3) =147a(4) =588a(5) =2303a(6) =8918a(7) =34300a(8) =131369a(9) =501809a(10) =1913597a(11) =7289436a(12) =27748357a(13) =105581574a(14) =401620072a(15) =1527436967a(16) =5808448779a(17) =22086364419a(18) =83978326796a(19) =319298327159
External references
- oeis: A215510