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A106586
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Digit next to last in squares ending in 6.
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0
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1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7, 7, 5, 9, 3, 1, 1, 3, 9, 5, 7
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Entries are always one of the odd digits 1,3,5,7,9.
Palindrome of period 10. [From Paul Curtz (bpcrtz(AT)free.fr), Jan 04 2009]
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FORMULA
| a(n)=(1/45)*{5*(n mod 10)+14*[(n+1) mod 10]+32*[(n+2) mod 10]-13*[(n+3) mod 10]+14*[(n+4) mod 10]+5*[(n+5) mod 10]-4*[(n+6) mod 10]+23*[(n+7) mod 10]-22*[(n+8) mod 10]-4*[(n+9) mod 10]}, wirh n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Jan 19 2009]
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MATHEMATICA
| Mod[Floor[ #^2/10], 10] & /@ Select[Range[700], Mod[ #^2, 10] == 6 &] (*Chandler*)
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CROSSREFS
| Cf. A000290.
Sequence in context: A085851 A092041 A193075 * A010633 A199053 A200595
Adjacent sequences: A106583 A106584 A106585 * A106587 A106588 A106589
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KEYWORD
| nonn,base
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AUTHOR
| Lekraj Beedassy (blekraj(AT)yahoo.com), May 10 2005
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), May 13 2005
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