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A017307
a(n) = (10*n + 3)^3.
2
27, 2197, 12167, 35937, 79507, 148877, 250047, 389017, 571787, 804357, 1092727, 1442897, 1860867, 2352637, 2924207, 3581577, 4330747, 5177717, 6128487, 7189057, 8365427, 9663597, 11089567, 12649337, 14348907, 16194277, 18191447, 20346417, 22665187, 25153757, 27818127
OFFSET
0,1
FORMULA
G.f.: (27 + 2089*x + 3541*x^2 + 343*x^3)/(x-1)^4. - R. J. Mathar, Mar 20 2018
a(n) = A000578(A017305(n)). - Michel Marcus, Apr 14 2022
MATHEMATICA
(10 Range[0, 30]+3)^3 (* or *) LinearRecurrence[{4, -6, 4, -1}, {27, 2197, 12167, 35937}, 30] (* Harvey P. Dale, Jul 05 2021 *)
PROG
(Magma) [(10*n+3)^3: n in [0..35]]; // Vincenzo Librandi, Jul 31 2011
(PARI) a(n) = (10*n + 3)^3; \\ Michel Marcus, Apr 14 2022
CROSSREFS
Sequence in context: A223476 A013779 A075081 * A167725 A366181 A272630
KEYWORD
nonn,easy
STATUS
approved