A276147 - OEIS

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A276147

a(2n+1) = 2n+1, a(2n) = A053669(2n) * a(A111701(2n)).

3

1, 3, 3, 9, 5, 5, 7, 27, 9, 15, 11, 15, 13, 21, 15, 81, 17, 15, 19, 45, 21, 33, 23, 45, 25, 39, 27, 63, 29, 7, 31, 243, 33, 51, 35, 25, 37, 57, 39, 135, 41, 35, 43, 99, 45, 69, 47, 135, 49, 75, 51, 117, 53, 45, 55, 189, 57, 87, 59, 21, 61, 93, 63, 729, 65, 55, 67, 153, 69, 105, 71, 75, 73, 111, 75, 171, 77, 65, 79, 405, 81, 123, 83, 105, 85, 129

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OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..2310

FORMULA

If n is odd, a(n) = n, and when even, a(n) = A053669(n) * a(A111701(n)).

Other identities. For all n >= 0:

a(2^n) = 3^n.

PROG

(Scheme)

(definec (A276147 n) (if (odd? n) n (* (A053669 n) (A276147 (A111701 n)))))

CROSSREFS

Cf. A053669, A111701.

Cf. A276148 (the even bisection).

Cf. also A276086.

Sequence in context: A348397 A066572 A307379 * A300782 A104195 A294178

Adjacent sequences: A276144 A276145 A276146 * A276148 A276149 A276150

KEYWORD

nonn

AUTHOR

Antti Karttunen, Aug 23 2016

STATUS

approved