A092445 a(n) is the first term of the sexy prime quadruple a(n), a(n)+6, a(n)+12 and a(n)+18 that becomes a perfect square if the rightmost digit (1) is removed.

11, 41, 251, 641, 4001, 68891, 121001, 163841, 198811, 466561, 497291, 1115561, 2560361, 6561001, 6806251, 7516891, 11793961, 13712411, 34633211, 47436841, 52670251, 71824001, 84739211

Offset: 1

Author

Ray G. Opao, Mar 24 2004

Keywords

• nonn
• base

Examples

			a(6)=68891. Removing the rightmost digit results in 6889 = 83^2.
		

Crossrefs

Cf. A023201, A046117.