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A016845 a(n) = (4n+3)^9. 2
19683, 40353607, 2357947691, 38443359375, 322687697779, 1801152661463, 7625597484987, 26439622160671, 78815638671875, 208728361158759, 502592611936843, 1119130473102767, 2334165173090451, 4605366583984375, 8662995818654939, 15633814156853823, 27206534396294947 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (10,-45,120,-210,252,-210,120,-45,10,-1).
FORMULA
From Amiram Eldar, Apr 24 2023: (Start)
a(n) = A004767(n)^9.
Sum_{n>=0} 1/a(n) = 511*zeta(9)/1024 - 277*Pi^9/16515072. (End)
MATHEMATICA
Table[(4*n + 3)^9, {n, 0, 20}] (* Amiram Eldar, Apr 24 2023 *)
CROSSREFS
Sequence in context: A016761 A250593 A016773 * A016893 A016953 A017025
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified June 20 09:16 EDT 2024. Contains 373515 sequences. (Running on oeis4.)