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A017079 a(n) = (8*n + 1)^3. 1
1, 729, 4913, 15625, 35937, 68921, 117649, 185193, 274625, 389017, 531441, 704969, 912673, 1157625, 1442897, 1771561, 2146689, 2571353, 3048625, 3581577, 4173281, 4826809, 5545233, 6331625, 7189057 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f.: (1 + 725*x + 2003*x^2 + 343*x^3)/(x-1)^4. - R. J. Mathar, Jul 14 2016
Sum_{n>=0} 1/a(n) = -psi''(1/8)/1024 = 1.0017122... - R. J. Mathar, May 07 2024
PROG
(Magma) [(8*n+1)^3: n in [0..40]]; // Vincenzo Librandi, Jul 11 2011
CROSSREFS
Sequence in context: A236334 A232286 A219133 * A062556 A017163 A233159
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified July 19 11:20 EDT 2024. Contains 374394 sequences. (Running on oeis4.)