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A299206 Ramanujan's tau function (or tau numbers (A000594)) for 5^n. 0
1, 4830, -25499225, -359001100500, -488895969711875, 15167983076643206250, 97133231781274332671875, -271470664160664028370625000, -6054036890966043032024015234375, -15985594659896064584391569753906250, 218396847859403327980436336954599609375 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

Eric Weisstein's World of Mathematics, Tau Function

FORMULA

G.f.: 1/(1-4830*x+48828125*x^2).

a(n) = A000594(A000351(n)). - Michel Marcus, Feb 05 2018

PROG

(PARI) {a(n) = ramanujantau(5^n)}

CROSSREFS

Cf. A000594, A000351, A035174, A064556.

Sequence in context: A153406 A153407 A252019 * A153408 A281885 A183589

Adjacent sequences:  A299203 A299204 A299205 * A299207 A299208 A299209

KEYWORD

sign

AUTHOR

Seiichi Manyama, Feb 05 2018

STATUS

approved

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Last modified February 20 20:31 EST 2020. Contains 332084 sequences. (Running on oeis4.)