login
A328222
Number of compositions of n into distinct parts such that the difference between adjacent parts is at least two.
2
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
0,5
COMMENTS
All terms are odd.
EXAMPLE
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.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 24 2020
STATUS
approved