The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A224778

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A224778

One half of the even numbers that are the sum of four nonzero squares.
(history; published version)

#4 by Joerg Arndt at Thu May 09 06:59:43 EDT 2013

STATUS

proposed

approved

#3 by Wolfdieter Lang at Thu May 09 06:06:58 EDT 2013

STATUS

editing

proposed

#2 by Wolfdieter Lang at Thu May 09 06:06:30 EDT 2013

NAME

allocated for Wolfdieter LangOne half of the even numbers that are the sum of four nonzero squares.

DATA

2, 5, 6, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79

OFFSET

1,1

COMMENTS

These are the even numbers of A000414 divided by 2.

FORMULA

a(n) is one half of the n-th even number of the sequence A000414.

CROSSREFS

Cf. A000414.

KEYWORD

allocated

nonn

AUTHOR

Wolfdieter Lang, May 09 2013

STATUS

approved

editing

#1 by Wolfdieter Lang at Wed Apr 17 12:24:45 EDT 2013

NAME

allocated for Wolfdieter Lang

KEYWORD

allocated

STATUS

approved