Number of length 2+6 0..n arrays with every seven consecutive terms having five times the sum of some two elements equal to two times the sum of the remaining five.
A249257
Number of length 2+6 0..n arrays with every seven consecutive terms having five times the sum of some two elements equal to two times the sum of the remaining five.
Terms
- a(0) =2a(1) =395a(2) =2048a(3) =10673a(4) =37442a(5) =108563a(6) =326788a(7) =834875a(8) =1849962a(9) =3798009a(10) =7085676a(11) =12662655a(12) =21180474a(13) =36068329a(14) =57764888a(15) =90289349a(16) =134865410a(17) =197997863a(18) =280852856a(19) =393449209a(20) =547109446a(21) =752377935a(22) =1008548684a(23) =1340579835
External references
- oeis: A249257