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A016814 (4n+1)^2. 8
1, 25, 81, 169, 289, 441, 625, 841, 1089, 1369, 1681, 2025, 2401, 2809, 3249, 3721, 4225, 4761, 5329, 5929, 6561, 7225, 7921, 8649, 9409, 10201, 11025, 11881, 12769, 13689, 14641, 15625, 16641, 17689 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

A bisection of A016754. Sequence arises from reading the line from 1, in the direction 1, 25,... in the square spiral whose vertices are the squares A000290. - Omar E. Pol (info(AT)polprimos.com), May 24 2008

FORMULA

a(n)=a(n-1)+32*n-8, n>0. [From V. Librandi, Dec 15 2010]

CROSSREFS

Cf. A000290, A001539, A016742, A016754, A016802, A016826, A016838.

Sequence in context: A033658 A080699 A134153 * A204708 A174623 A100487

Adjacent sequences:  A016811 A016812 A016813 * A016815 A016816 A016817

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.