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A067102 Floor[ X/Y] where X = concatenation of the squares and Y = concatenation of natural numbers. 3
1, 1, 1, 12, 120, 1208, 12082, 120821, 1208216, 12082165, 120821655, 1208216555, 12082165556, 120821655562, 1208216555626, 12082165556267, 120821655562672, 1208216555626728, 12082165556267282, 120821655562672822 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

a(5) = floor [1491625/12345]=floor[] = floor[120.828270554880518428513568246254]=120.

MATHEMATICA

f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[k^2]]; y = StringJoin[y, ToString[k]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 20} ]

CROSSREFS

Cf. A067091, A067092, A067093, A067094, A067095, A067096, A067097, A067098, A067099, A067100, A067101.

floor[A019521(n)/A007908(n)]

Sequence in context: A037511 A037694 A242810 * A129064 A120585 A239188

Adjacent sequences:  A067099 A067100 A067101 * A067103 A067104 A067105

KEYWORD

easy,base,nonn

AUTHOR

Amarnath Murthy, Jan 07 2002

EXTENSIONS

More terms from Robert G. Wilson v, Jan 09 2002

STATUS

approved

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Last modified March 25 08:15 EDT 2019. Contains 321469 sequences. (Running on oeis4.)