What sequence is this the start of: 1 4 11 20 31 44 61 100?

Questions

The ocean liner Queen Elizabeth was launched at Glasgow.?

Actors Hume Cronyn and Jessica Tandy are married.?

Dumitru Prunariu, first Rumanian space traveler (on board Soyuz 40), born.?

Cheryl Tiegs (in Minnesota), model and actor, born.?

Shaun Cassidy, singer, born.?