Ratio of quadruple Sum of k^2-1 to quadruple sum of k made into an integer sequence: (1/6)*(-1 + n)*(2 + n)*(3 + n)*(7 + n).
A130863
Ratio of quadruple Sum of k^2-1 to quadruple sum of k made into an integer sequence: (1/6)*(-1 + n)*(2 + n)*(3 + n)*(7 + n).
Terms
- a(0) =0a(1) =30a(2) =100a(3) =231a(4) =448a(5) =780a(6) =1260a(7) =1925a(8) =2816a(9) =3978a(10) =5460a(11) =7315a(12) =9600a(13) =12376a(14) =15708a(15) =19665a(16) =24320a(17) =29750a(18) =36036a(19) =43263a(20) =51520a(21) =60900a(22) =71500a(23) =83421a(24) =96768a(25) =111650a(26) =128180a(27) =146475a(28) =166656a(29) =188848
External references
- oeis: A130863