a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502.
A130503
a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =12a(4) =12a(5) =4a(6) =28a(7) =56a(8) =504a(9) =2520a(10) =27720a(11) =27720a(12) =27720a(13) =27720a(14) =5544a(15) =11088a(16) =188496a(17) =62832a(18) =1193808a(19) =5969040a(20) =1989680a(21) =1989680a(22) =45762640a(23) =137287920a(24) =686439600a(25) =8923714800a(26) =80313433200a(27) =80313433200
External references
- oeis: A130503