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A016923 (6n+1)^3. 2
1, 343, 2197, 6859, 15625, 29791, 50653, 79507, 117649, 166375, 226981, 300763, 389017, 493039, 614125, 753571, 912673, 1092727, 1295029, 1520875, 1771561, 2048383, 2352637, 2685619, 3048625 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

S. R. Finch, Mathematical Constants, Cambridge, 2003, Section 1.6.3.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

FORMULA

Sum_{n>=0} 1/a(n) = pi^3/(36 sqrt(3)) + 91 zeta(3)/216.

PROG

(MAGMA) [(6*n+1)^3: n in [0..60]]; /7 Vincenzo Librandi, May 04 2011

CROSSREFS

Sequence in context: A075546 A167733 A167730 * A016983 A134738 A017151

Adjacent sequences:  A016920 A016921 A016922 * A016924 A016925 A016926

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 15 03:33 EST 2012. Contains 205694 sequences.