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A019522 Concatenate cubes. 5
1, 18, 1827, 182764, 182764125, 182764125216, 182764125216343, 182764125216343512, 182764125216343512729, 1827641252163435127291000, 18276412521634351272910001331, 182764125216343512729100013311728 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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

LINKS

Table of n, a(n) for n=1..12.

Y. Guo and M. Le, Smarandache concatenated power decimals and their irrationality, Smarandache Notions Journal, Vol. 9, No. 1-2. 1998, 100-102.

Eric Weisstein's World of Mathematics, Consecutive Number Sequences

FORMULA

a(n) = a(n-1)*10^floor(1 + log_10(n^3)) + n^3, with a(1)=1. - Paolo P. Lava, 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, Jun 20 2008

CROSSREFS

Cf. A007908, A000578, A019521.

Sequence in context: A055740 A072477 A249332 * A068181 A296614 A230818

Adjacent sequences:  A019519 A019520 A019521 * A019523 A019524 A019525

KEYWORD

base,nonn,easy

AUTHOR

R. Muller

STATUS

approved

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Last modified October 16 06:34 EDT 2019. Contains 328051 sequences. (Running on oeis4.)