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A061110 a(1) = 1; a(n) = smallest number such that the concatenation a(1)a(2)...a(n) is a square. 3
1, 6, 9, 744, 41796, 60172924176, 8240010144800000000001, 82400101448000000000020000000000000000000001 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

Amarnath Murthy, Exploring some new ideas on Smarandache type sets, functions and sequences, Smarandache Notions Journal Vol. 11, No. 1-2-3, Spring 2000.

LINKS

M. L. Perez et al., eds., Smarandache Notions Journal

EXAMPLE

a(1) = 1, a(1)a(2)=16 =4^2, a(1)a(2)a(3)= 169= 13^2, 169744= 412^2.

CROSSREFS

Cf. A061109, A051671. The actual squares are in A048557.

Sequence in context: A156180 A191011 A053490 * A110460 A159190 A004075

Adjacent sequences:  A061107 A061108 A061109 * A061111 A061112 A061113

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 20 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Jul 23 2001. The next term is too large to include.

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Last modified February 17 07:27 EST 2012. Contains 205998 sequences.