A379527 Number of compositions (ordered partitions) of 1 into {1/1, 1/3, 1/5, ..., 1/(2*n-1)}.
1, 2, 3, 4, 22, 23, 24, 5115, 5116, 5117, 1689273, 1689274, 441985160, 191869129330, 191869129331, 191869129332
Offset: 1
Formula
If 2*n-1 is prime, then a(n) = a(n-1) + 1. - Chai Wah Wu, Dec 26 2024
Extensions
a(13)-a(16) from Chai Wah Wu, Dec 27 2024