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A069356 Primes of the form 2^i*3^j - (i+j) with i, j >= 0. 5
2, 5, 7, 43, 67, 103, 157, 281, 503, 641, 1451, 3061, 4597, 6553, 8179, 10357, 15541, 34981, 78721, 209939, 524269, 1062869, 2097131, 13436909, 25509151, 28311529, 63700969, 113246183, 153054989, 516560633, 573308903, 774840959, 805306339 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..300

MATHEMATICA

Take[ Select[ Union[ Flatten[ Table[2^i*3^j - (i + j), {i, 0, 28}, {j, 0, 18}]]], PrimeQ[ # ] &], 33]

CROSSREFS

Cf. A069355, A005105, A069358, A069346.

Sequence in context: A062645 A174259 A215213 * A041653 A182785 A041125

Adjacent sequences:  A069353 A069354 A069355 * A069357 A069358 A069359

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 18 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v, May 09 2003

STATUS

approved

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Last modified September 23 13:55 EDT 2017. Contains 292358 sequences.