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A182352 Primes of the form n*2^n - 3. 4
5, 61, 157, 229373, 1048573, 2228221, 584115552253, 10445360463869, 1448241753615514100500122329229605507956733, 8380834989110329694147210304728253347914979574441574397 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are similar to the Woodall primes, A050918, which are primes of the form n*2^n-1.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

5 = 2*2^2 - 3;  61 = 4*2^4 - 3.

MAPLE

#choose N large, then S is the desired set

f:=n->n*2^n - 3:

S:={}:

for n from 0 to N do if(isprime(f(n))) then S:=S union {f(n)}: fi: od

CROSSREFS

Cf. A050918.

Sequence in context: A174053 A107191 A321616 * A142643 A201848 A087871

Adjacent sequences:  A182349 A182350 A182351 * A182353 A182354 A182355

KEYWORD

nonn

AUTHOR

Patrick Devlin, Apr 25 2012

STATUS

approved

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Last modified December 5 06:52 EST 2021. Contains 349543 sequences. (Running on oeis4.)