Number of length 1+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
A249291
Number of length 1+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
Terms
- a(0) =14a(1) =66a(2) =204a(3) =524a(4) =1098a(5) =2070a(6) =3584a(7) =5808a(8) =8934a(9) =13202a(10) =18828a(11) =26100a(12) =35306a(13) =46758a(14) =60792a(15) =77792a(16) =98118a(17) =122202a(18) =150476a(19) =183396a(20) =221442a(21) =265142a(22) =315000a(23) =371592a(24) =435494a(25) =507306a(26) =587652a(27) =677204a(28) =776610a(29) =886590
External references
- oeis: A249291