A215030 a(n) = A215029(A000040(n)), where A000040(n) is the n-th prime.

2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 2, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 2, 1, 2, 1, 0, 1, 2, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 2, 1, 2, 1, 0, 1, 2

Offset

1,1

Comments

For primes whose value is 0, see A214912; for value 1 see A031215; and for value 2 see A215031.

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

StackExchange, A prime number pattern, Jul 29 2012.

Prog

(PARI)
A215029(n) = if(n<=2, n, my(mp=precprime(n-1), d=n); while(mp>0, if(d>0, d -= mp, d += mp); mp = precprime(mp-1)); (d));
A215030(n) = A215029(prime(n)); \\ Antti Karttunen, Nov 28 2018

Crossrefs

Cf. A000040, A215029, A214912, A031215, A215031, A215032, A215033, A215034, A215035.

Sequence in context: A307194 A331218 A120086 * A175816 A227573 A085004

Adjacent sequences: A215027 A215028 A215029 * A215031 A215032 A215033

Keyword

nonn

Author

N. J. A. Sloane, Aug 05 2012

Status

approved