A182352 Primes of the form n*2^n - 3.

5, 61, 157, 229373, 1048573, 2228221, 584115552253, 10445360463869, 1448241753615514100500122329229605507956733, 8380834989110329694147210304728253347914979574441574397

Offset: 1

Author

Patrick Devlin, Apr 25 2012

Keywords

• nonn

Comments

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

Examples

			5 = 2*2^2 - 3;  61 = 4*2^4 - 3.
		

Crossrefs

Cf. A050918.

Programs

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