a(n) = a(n-1) XOR Sum_{k=1..n-1} a(k), with a(1)=1, a(2)=3, where XOR is the binary exclusive OR operation.
A099811
a(n) = a(n-1) XOR Sum_{k=1..n-1} a(k), with a(1)=1, a(2)=3, where XOR is the binary exclusive OR operation.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =12a(4) =27a(5) =41a(6) =114a(7) =191a(8) =307a(9) =908a(10) =1479a(11) =2517a(12) =7218a(13) =11819a(14) =20079a(15) =57564a(16) =94035a(17) =233905a(18) =327970a(19) =954519a(20) =1356507a(21) =3827708a(22) =5462751a(23) =15712989a(24) =21207042a(25) =61631203a(26) =87045927a(27) =251438028a(28) =339057531a(29) =986402633
External references
- oeis: A099811