Companies such as Lesco and Scotts which specialise in turf products and equipment, also have small prilled, turf starter fertiliser with some slow release nitrogen. Quite good to use but can be more expensive and may be more difficult to source.
Commonly the NPK ratios are around 20: 12: 15, often with 5-10% sulfur as well, plus trace elements, for these starter fertilisers.
There are other brands as well, but many other brands are less well known and less available for smaller users.
Use what is available and attractively priced in your region. These products are soluble fertiliser and can be mobile ie leach, and need additional fertiliser within about 4 weeks of application.