A163499 Take A163498(n) written in binary, insert a 0 before every 1. a(n) is the decimal equivalent of the result.

2, 5, 37, 41, 149, 137, 293, 677, 1109, 593, 1301, 1321, 673, 1061, 1097, 2377, 641, 1289, 2693, 10837, 2069, 2089, 2129, 4261, 4421, 2593, 5281, 21157, 2689, 5393, 21589, 43669, 4133, 4229, 8741, 8849, 9257, 4673, 18757, 20773, 20809, 41621, 41641, 21013

Offset

1,1

Comments

All terms of this sequence and of A163498 are primes.

Equivalent to: Take the numbers in A163498 written as binary, and insert a 0 after every 1. Divide by 2 and write it as a decimal. - Chai Wah Wu, Jul 29 2014

Links

Chai Wah Wu, Table of n, a(n) for n = 1..2000

Prog

(Python) from sympy import prime, isprime
[int(bin(prime(n)).replace('1', '01'), 2) for n in range(1, 1000) if isprime(int(bin(prime(n)).replace('1', '01'), 2))] # Chai Wah Wu, Jul 28 2014

Crossrefs

Cf. A163498.

Sequence in context: A331402 A284605 A106129 * A086218 A202637 A138658

Adjacent sequences: A163496 A163497 A163498 * A163500 A163501 A163502

Keyword

base,nonn

Author

Leroy Quet, Jul 29 2009

Extensions

More terms from Chai Wah Wu, Jul 28 2014

Status

approved