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A197985 Round((n+1/n)^2) 2
4, 6, 11, 18, 27, 38, 51, 66, 83, 102, 123, 146, 171, 198, 227, 258, 291, 326, 363, 402, 443, 486, 531, 578, 627, 678, 731, 786, 843, 902, 963, 1026, 1091, 1158, 1227, 1298, 1371, 1446, 1523, 1602, 1683, 1766, 1851, 1938, 2027 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Shifted variant of A102305. - R. J. Mathar, Oct 20 2011

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = n^2+2, n>1; a(n) = 2*n+a(n-1)-1, n>2.

MATHEMATICA

Table[Floor[(n+1/n)^2+1/2], {n, 50}] (* Harvey P. Dale, Aug 12 2012 *)

PROG

(MAGMA) [Round((n+1/n)^2): n in [1..60]]

CROSSREFS

Cf. A183199, A059100.

Sequence in context: A343346 A296468 A060577 * A058579 A022318 A291916

Adjacent sequences:  A197982 A197983 A197984 * A197986 A197987 A197988

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 20 2011

STATUS

approved

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Last modified July 7 12:47 EDT 2022. Contains 355148 sequences. (Running on oeis4.)