Nested floor product of n and fractions (k+1)/k for all k>0 (mod 6), divided by 6.

Terms

a(0) =1a(1) =7a(2) =28a(3) =84a(4) =175a(5) =421a(6) =847a(7) =1288a(8) =1939a(9) =3780a(10) =5656a(11) =9247a(12) =15148a(13) =22099a(14) =25375a(15) =39676a(16) =54607a(17) =75208a(18) =90559a(19) =129360a(20) =166321a(21) =209832a(22) =240268a(23) =320719a(24) =399595a(25) =536956a(26) =672672a(27) =816733a(28) =906444a(29) =1115275