The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A081450 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A081450

a(n) = sqrt(A081449(n))/6.
(history; published version)

#7 by Bruno Berselli at Tue Mar 10 12:36:12 EDT 2015

STATUS

editing

approved

#6 by Bruno Berselli at Tue Mar 10 12:36:06 EDT 2015

CROSSREFS

Cf. A081449.

STATUS

proposed

editing

#5 by Colin Barker at Tue Mar 10 12:20:52 EDT 2015

STATUS

editing

proposed

#4 by Colin Barker at Tue Mar 10 12:20:31 EDT 2015

NAME

Sqrta(n) = sqrt(A081449(n))/6.

PROG

(PARI) t=17:; for(n=2, 200, for(k=1, 10^8, if(isprime(k^2+t), print1(k/6", "):; t=t+k^2:; break)))

STATUS

approved

editing

Discussion

Tue Mar 10

12:20

Colin Barker: Replaced colons by semicolons in PARI code so that it can be executed using recent versions of PARI.

#3 by Russ Cox at Fri Mar 30 18:41:15 EDT 2012

AUTHOR

_Ralf Stephan (ralf(AT)ark.in-berlin.de), _, Mar 21 2003

Discussion

Fri Mar 30

18:41

OEIS Server: https://oeis.org/edit/global/233

#2 by N. J. A. Sloane at Thu Feb 19 03:00:00 EST 2004

PROG

(PARI) t=17:for(n=2, 200, for(k=1, 10^8, if(isprime(k^2+t), print1(k/6", "):t=t+k^2:break)))

KEYWORD

nonn,new

nonn

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Sqrt(A081449)/6.

DATA

1, 1, 2, 1, 3, 5, 2, 4, 2, 1, 4, 7, 2, 2, 6, 1, 1, 8, 2, 3, 5, 14, 6, 6, 2, 1, 5, 17, 2, 2, 1, 10, 1, 4, 5, 5, 3, 1, 8, 7, 2, 4, 2, 4, 2, 1, 1, 1, 2, 7, 4, 3, 2, 5, 9, 3, 1, 7, 4, 3, 10, 1, 2, 10, 9, 1, 1, 5, 2, 2, 1, 3, 1, 2, 15, 1, 1, 5, 3, 5, 1, 8, 2, 4, 1, 5, 2, 7, 1, 4, 2, 1, 23, 4, 2, 1, 3, 2, 7

OFFSET

1,3

COMMENTS

Partial maxima are in A081453.

PROG

(PARI) t=17:for(n=2, 200, for(k=1, 10^8, if(isprime(k^2+t), print1(k/6", "):t=t+k^2:break)))

KEYWORD

nonn

AUTHOR

Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 21 2003

STATUS

approved