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A038398 Concatenate first n cubes in reverse order. 0
1, 81, 2781, 642781, 125642781, 216125642781, 343216125642781, 512343216125642781, 729512343216125642781, 1000729512343216125642781, 13311000729512343216125642781, 172813311000729512343216125642781 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Mihaly Bencze [Beneze], L. Tutescu, Some Notions and Questions in Number Theory, Sequence 6.

LINKS

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

FORMULA

a(n) = (n^3)*10^floor(1 + log_10(a(n-1))) + a(n-1), 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:=n^3*10^floor(evalf(1+log10(a), 1000))+a; print(a); od; end: P(100); # Paolo P. Lava, Jun 20 2008

MATHEMATICA

nn=20; With[{c=Reverse[Range[nn]^3]}, Table[FromDigits[Flatten[ IntegerDigits/@ Take[ c, -n]]], {n, nn}]] (* Harvey P. Dale, Sep 28 2013 *)

CROSSREFS

Cf. A000578, A019522, A038397.

Sequence in context: A253525 A253741 A253516 * A205902 A295252 A295651

Adjacent sequences:  A038395 A038396 A038397 * A038399 A038400 A038401

KEYWORD

nonn,base,easy

AUTHOR

M. I. Petrescu (mipetrescu(AT)yahoo.com)

EXTENSIONS

More terms from Andrew Gacek (andrew(AT)dgi.net), Feb 21 2000

STATUS

approved

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Last modified September 16 06:38 EDT 2019. Contains 327090 sequences. (Running on oeis4.)