A053998 Smallest prime in n-th shell of prime spiral.

2, 3, 29, 101, 229, 421, 673, 1013, 1429, 1889, 2441, 3089, 3821, 4639, 5521, 6491, 7577, 8741, 9941, 11329, 12757, 14341, 15881, 17623, 19477, 21397, 23333, 25471, 27743, 30059, 32441, 34871, 37507, 40237, 42953, 46021

Offset

0,1

Links

Table of n, a(n) for n=0..35.

Example

a(2)=3 because it is the first prime in shell 1 (prime 2 is in shell 0).

Crossrefs

Sequence in context: A108657 A116325 A228021 * A144953 A132282 A064893

Adjacent sequences: A053995 A053996 A053997 * A053999 A054000 A054001

Keyword

easy,nonn

Author

Enoch Haga, Apr 06 2000

Status

approved