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A293214 a(n) = Product_{d|n, d<n} A019565(d). 25
1, 2, 2, 6, 2, 36, 2, 30, 12, 60, 2, 2700, 2, 180, 120, 210, 2, 7560, 2, 6300, 360, 252, 2, 661500, 20, 420, 168, 94500, 2, 23814000, 2, 2310, 504, 132, 600, 43659000, 2, 396, 840, 2425500, 2, 187110000, 2, 207900, 352800, 1980, 2, 560290500, 60, 194040, 264, 485100, 2, 115259760, 840, 254677500, 792, 4620, 2, 264737261250000, 2, 13860 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..1024

Index entries for sequences related to binary expansion of n

FORMULA

a(n) = Product_{d|n, d<n} A019565(d).

a(n) = A300830(n) * A300831(n) * A300832(n). - Antti Karttunen, Mar 16 2018

Other identities.

For n >= 0, a(2^n) = A002110(n).

For n >= 1:

A048675(a(n)) = A001065(n).

A001222(a(n)) = A292257(n).

A007814(a(n)) = A091954(n).

A087207(a(n)) = A218403(n).

A248663(a(n)) = A227320(n).

PROG

(PARI)

A019565(n) = {my(j, v); factorback(Mat(vector(if(n, #n=vecextract(binary(n), "-1..1")), j, [prime(j), n[j]])~))}; \\ From A019565

A293214(n) = { my(m=1); fordiv(n, d, if(d < n, m *= A019565(d))); m; };

CROSSREFS

Cf. A001065, A002110, A019565, A048675, A091954, A292257, A293215 (restricted growth sequence transform).

Cf. also A293216, A293221, A293222, A293225, A293231, A293442, A300830, A300831, A300832, A300833, A300834.

Sequence in context: A308692 A319352 A300834 * A293216 A319708 A230266

Adjacent sequences:  A293211 A293212 A293213 * A293215 A293216 A293217

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Oct 03 2017

STATUS

approved

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Last modified August 9 10:10 EDT 2020. Contains 336323 sequences. (Running on oeis4.)