A155190 Non-triangular numbers having a unique representation as p + t, where p is prime and t is a triangular number.

2, 4, 7, 9, 16, 25, 27, 42, 54, 61, 63, 70, 75, 87, 90, 121, 126, 129, 135, 186, 211, 246, 315, 333, 345, 396, 405, 540, 556, 690, 717, 801, 924, 960, 1080, 1863, 2376, 2826, 3900, 6210, 8316

Offset: 1

Author

T. D. Noe, Jan 21 2009

Keywords

• nonn

Comments

Conjectured to be finite. The prime terms are in A065397.

Examples

			n=p+t: 2=2+0; 4=3+1; 7=7+0; 9=3+6; 16=13+3; 25=19+6; 27=17+10; 42=41+1; 54=53+1
		

Crossrefs

A132399, A154752