dart sequence

[40, 2, 36, 8, 26, 12, 20, 30, 4, 34, 6, 38, 14, 32, 16, 22, 28, 18, 24, 10,    // Doubles
 20, 1, 18, 4, 13, 6, 10, 15, 2, 17, 3, 19, 7, 16, 8, 11, 14, 9, 12, 5,         // Singles between doubles-triples
 60, 3, 54, 12, 39, 18, 30, 45, 6, 51, 9, 57, 21, 48, 24, 33, 42, 27, 36, 15,   // Triples
 20, 1, 18, 4, 13, 6, 10, 15, 2, 17, 3, 19, 7, 16, 8, 11, 14, 9, 12, 5,         // Singles between triples-bull
 25,                                                                            // Single Bull
 50]                                                                            // Triple Bull