A144832 - OEIS

A144832

Distance from nxtprm(n^2) to (n+1)^2 in A144831 is prime.

2, 5, 7, 11, 17, 17, 23, 29, 31, 41, 47, 67, 71, 71, 89, 89, 97, 113, 109, 107, 127, 131, 137, 157, 167, 173, 173, 191, 197, 193, 197, 227, 233, 227, 251, 257, 271, 293, 271, 307, 313, 317, 331, 349, 353, 383, 383, 409, 419, 431, 449, 463, 467, 487, 503, 509

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

FORMULA

Terms in this sequence are from A144831 iff the distance from nxtprm n^2 to (n+1)^2 is prime.

EXAMPLE

a(2)=5 because 3^2=9 and 4^2=16. Nxtprm(3^2)=11 and 16-11=5, a prime.

CROSSREFS

A007491 A053000 A144831

Sequence in context: A062409 A342939 A089781 * A309290 A023238 A194991

Adjacent sequences: A144829 A144830 A144831 * A144833 A144834 A144835

KEYWORD

easy,nonn

AUTHOR

Enoch Haga, Sep 22 2008

STATUS

approved