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A016950
a(n) = (6*n + 3)^6.
7
729, 531441, 11390625, 85766121, 387420489, 1291467969, 3518743761, 8303765625, 17596287801, 34296447249, 62523502209, 107918163081, 177978515625, 282429536481, 433626201009, 646990183449, 941480149401, 1340095640625, 1870414552161, 2565164201769, 3462825991689
OFFSET
0,1
FORMULA
From Amiram Eldar, Mar 30 2022: (Start)
a(n) = A016945(n)^6 = A016946(n)^3 = A016947(n)^2.
a(n) = 3^6*A016758(n).
Sum_{n>=0} 1/a(n) = Pi^6/699840. (End)
MATHEMATICA
(3 + 6Range[0, 20])^6 (* Harvey P. Dale, Jan 31 2011 *)
PROG
(Magma) [(6*n+3)^6: n in [0..40]]; // Vincenzo Librandi, May 05 2011
CROSSREFS
Subsequence of A001014.
Sequence in context: A222443 A223330 A228976 * A223793 A223979 A223574
KEYWORD
nonn,easy
STATUS
approved