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A106843 Numbers of form 3^i * prime(j), i>=0, j>0. 0
2, 3, 5, 6, 7, 9, 11, 13, 15, 17, 18, 19, 21, 23, 27, 29, 31, 33, 37, 39, 41, 43, 45, 47, 51, 53, 54, 57, 59, 61, 63, 67, 69, 71, 73, 79, 81, 83, 87, 89, 93, 97, 99, 101, 103, 107, 109, 111, 113, 117, 123, 127, 129, 131, 135, 137, 139, 141, 149, 151, 153, 157, 159 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) is either prime or of form 3a(m), m<n.

LINKS

Table of n, a(n) for n=1..63.

CROSSREFS

Cf. A093641.

Sequence in context: A114148 A218442 A255057 * A057165 A245395 A023884

Adjacent sequences:  A106840 A106841 A106842 * A106844 A106845 A106846

KEYWORD

nonn

AUTHOR

Ralf Stephan, May 05 2005

STATUS

approved

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Last modified November 12 21:10 EST 2018. Contains 317116 sequences. (Running on oeis4.)