A182353 -id:A182353 - cp's OEIS frontend

A182354 Primes of the form n*2^n + 3.

3, 5, 11, 67, 163, 10243, 22531, 7516192771, 43980465111043, 142788163609707759784588649053552643, 2637188343637273091841153207596203638787

Offset: 1

Patrick Devlin, Apr 25 2012

nonn

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

			3 = 0*2^0 + 3; 5 = 1*2^1 + 3; 11 = 2*2^2 + 3; 67 = 4*2^4 + 3

Cf. A050918, A182352, A182353.

#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

A182342 Primes of the form n*2^n + 5.

Original entry on oeis.org

5, 7, 13, 29, 389, 2053, 49157, 106501, 402653189, 1744830469, 2473901162501, 184717953466373, 774056185954309, 31057439705591620336669228531717, 70745044697537026438728012485623813

Offset: 1

Patrick Devlin, Apr 25 2012

nonn

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

			5 = 0*2^0 + 5; 7 = 1*2^1 + 5; 13 = 2*2^2 + 5; 29 = 3*2^3 + 5; 389 = 6*2^6 + 5

Cf. A050918, A182354, A182352, A182353.

#choose N large, then S is the desired set
f:=n->n*2^n + 5:
S:={}:
for n from 0 to N do if(isprime(f(n))) then S:=S union {f(n)}: fi: od

cp's OEIS Frontend

A182354 Primes of the form n*2^n + 3.

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