login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A059591 Squarefree part of n^2+1. 3
1, 2, 5, 10, 17, 26, 37, 2, 65, 82, 101, 122, 145, 170, 197, 226, 257, 290, 13, 362, 401, 442, 485, 530, 577, 626, 677, 730, 785, 842, 901, 962, 41, 1090, 1157, 1226, 1297, 1370, 5, 1522, 1601, 2, 1765, 74, 1937, 2026, 2117, 2210, 2305, 2402, 2501, 2602 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

a(n)=A007913[n^2+1], a(n)*A059592[n]^2 = n^2+1 Related to period-1 continued fractions [z,z,z,...]

EXAMPLE

a(7)=2 since 7^2+1 = 50 = 25*2 = (5^2)*2

CROSSREFS

A007913, A059592, A000188.

Sequence in context: A078393 A100292 A078325 * A082607 A159547 A002522

Adjacent sequences:  A059588 A059589 A059590 * A059592 A059593 A059594

KEYWORD

easy,nonn

AUTHOR

Marc LeBrun (mlb(AT)well.com), Jan 25 2001

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 14:07 EST 2012. Contains 205930 sequences.