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

1,1

Links

Table of n, a(n) for n=1..23.

Example

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

Crossrefs

Cf. A023201, A046117.

Sequence in context: A118572 A333084 A201709 * A068840 A082424 A153173

Adjacent sequences: A092442 A092443 A092444 * A092446 A092447 A092448

Keyword

nonn,base

Author

Ray G. Opao, Mar 24 2004

Status

approved