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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. 0
11, 41, 251, 641, 4001, 68891, 121001, 163841, 198811, 466561, 497291, 1115561, 2560361, 6561001, 6806251, 7516891, 11793961, 13712411, 34633211, 47436841, 52670251, 71824001, 84739211 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 20 13:10 EDT 2021. Contains 345164 sequences. (Running on oeis4.)