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A059592 Square-full part of n^2+1. 9
1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 17, 1, 1, 29, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 13, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

a(n)=A000188[n^2+1], A059591[n]*a(n)^2 = n^2+1 Related to period-1 continued fractions [z,z,z,...]

A124808 gives number of numbers m<=n with a(m)=1. - Reinhard Zumkeller, Nov 08

LINKS

R. Zumkeller, Table of n, a(n) for n = 0..1000

EXAMPLE

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

CROSSREFS

A000188, A059591, A007913.

Cf. A002522.

Sequence in context: A337337 A119788 A334561 * A295554 A319099 A098087

Adjacent sequences: A059589 A059590 A059591 * A059593 A059594 A059595

KEYWORD

easy,nonn

AUTHOR

Marc LeBrun, Jan 25 2001

STATUS

approved

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Last modified December 5 06:35 EST 2022. Contains 358582 sequences. (Running on oeis4.)