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A019522 Concatenate cubes. +0
2
1, 18, 1827, 182764, 182764125, 182764125216, 182764125216343, 182764125216343512, 182764125216343512729, 1827641252163435127291000, 18276412521634351272910001331, 182764125216343512729100013311728 (list; graph; listen)
OFFSET

1,2

REFERENCES

F. Smarandache, "Collected Papers", Vol. II, Tempus Publ. Hse., Buharest, Romania, 1996.

S. Smarandoiu, Convergence of Smarandache continued fractions, Abstract 96T-11-195, Abstracts Amer. Math. Soc., 17 (No. 4, 1996), 680.

Y. Guo, M. Le, Smarandache Concatenated Power Decimals and Their Irrationality, Smarandache Notions Journal, Vol. 9, No. 1-2. 1998, 100-102.

LINKS

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

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

F. Smarandache, Collected Papers, Vol. II

FORMULA

a(n)=a(n-1)*10^floor[1+log10(n^3)]+n^3, with a(1)=1 - Paolo P. Lava (ppl(AT)spl.at), Jun 20 2008

MAPLE

P:=proc(i) local a, n; a:=1; print(1); for n from 2 by 1 to i do a:=a*10^floor(evalf(1+log10(n^3), 1000))+n^3; print(a); od; end: P(100); - Paolo P. Lava (ppl(AT)spl.at), Jun 20 2008

CROSSREFS

Sequence in context: A067303 A055740 A072477 this_sequence A068181 A136834 A001325

Adjacent sequences: A019519 A019520 A019521 this_sequence A019523 A019524 A019525

KEYWORD

base,nonn,easy

AUTHOR

R. Muller

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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