a(0) = 0. a(n) is the number of repeating sums in the collection of all sums of any k elements in [a(0), ... a(n-1)] chosen without replacement for 2 <= k <= n.
A247188
a(0) = 0. a(n) is the number of repeating sums in the collection of all sums of any k elements in [a(0), ... a(n-1)] chosen without replacement for 2 <= k <= n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =3a(4) =9a(5) =22a(6) =49a(7) =104a(8) =215a(9) =438a(10) =885a(11) =1780a(12) =3571a(13) =7154a(14) =14321a(15) =28656a(16) =57327a(17) =114670a(18) =229357a(19) =458732a(20) =917483a(21) =1834986a(22) =3669993a(23) =7340008a(24) =14680039a(25) =29360102a(26) =58720229a(27) =117440484a(28) =234880995a(29) =469762018
External references
- oeis: A247188