Compatibility summary
You will need a travel adapter in Seychelles; plug types used there differ from India.
Plug comparison
India plug types: C D M
Seychelles plug types: G
There is no common plug type between India (C D M) and Seychelles (G). You need a travel adapter.
Voltage comparison
India: 230V, 50Hz
Seychelles: 240V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.