A328222 Number of compositions of n into distinct parts such that the difference between adjacent parts is at least two.
1, 1, 1, 1, 3, 3, 5, 7, 11, 15, 23, 31, 47, 63, 91, 133, 183, 255, 355, 487, 661, 973, 1287, 1783, 2411, 3289, 4383, 5905, 8337, 10975, 14829, 19783, 26451, 34945, 46403, 60539, 84109, 108471, 144591, 189013, 250257, 324451, 426705, 550443, 715421, 961249
Offset: 0
Keywords
Examples
a(7) = 7: 142, 241, 25, 52, 16, 61, 7. a(8) = 11: 314, 413, 152, 251, 35, 53, 26, 62, 17, 71, 8. a(9) = 15: 135, 153, 315, 351, 513, 531, 162, 261, 36, 63, 27, 72, 18, 81, 9. a(10) = 23: 2413, 3142, 253, 352, 415, 514, 136, 163, 316, 361, 613, 631, 46, 64, 172, 271, 37, 73, 28, 82, 19, 91, 10.
Comments