A213179 Numbers k such that 2*k is a partition number.

1, 11, 15, 21, 28, 88, 245, 396, 501, 979, 1218, 1505, 1859, 2802, 3421, 6155, 18669, 26587, 44567, 52779, 62377, 102113, 225638, 307077, 357610, 415910, 650078, 870815, 1006279, 1161760, 2043984, 3544750, 4059132, 6066082, 6924325, 7898238, 13271830

Offset: 1

Author

Omar E. Pol, Feb 27 2013

Keywords

• nonn

Examples

			11 is in the sequence because 2*11 = 22 and 22 is a partition number: p(8) = A000041(8) = 22.
		

Crossrefs

Cf. A000041, A052001, A213365, A216258, A217725, A217726, A222175, A222178, A222179, A225317, A225323.

Programs

Mathematica

Select[PartitionsP[Range@200]/2, IntegerQ] (* Giovanni Resta, May 05 2013 *)

Formula

a(n) = A052001(n)/2.