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A239885 a(n) = prime(n)*2^(n-2). 0
1, 3, 10, 28, 88, 208, 544, 1216, 2944, 7424, 15872, 37888, 83968, 176128, 385024, 868352, 1933312, 3997696, 8781824, 18612224, 38273024, 82837504, 174063616, 373293056, 813694976, 1694498816, 3456106496, 7180648448, 14629732352, 30333206528 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..30.

FORMULA

a(n) = A110295(n)/2.

EXAMPLE

1 is in this sequence because prime(1)*2^(1-2) = 2*2^(-1) = 1.

MATHEMATICA

Table[Prime[n]2^(n-2), {n, 30}] (* Harvey P. Dale, Aug 19 2019 *)

PROG

(PARI) vector(50, n, prime(n)*2^(n-2)) \\ Colin Barker, Mar 29 2014

CROSSREFS

Cf. A110295.

Sequence in context: A027252 A104574 A307063 * A262251 A246974 A278294

Adjacent sequences:  A239882 A239883 A239884 * A239886 A239887 A239888

KEYWORD

nonn,easy

AUTHOR

Gerasimov Sergey, Mar 29 2014

STATUS

approved

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Last modified November 19 16:37 EST 2019. Contains 329323 sequences. (Running on oeis4.)