The On-Line Encyclopedia of Integer Sequences (OEIS)

A224778 revision #3

A224778

One half of the even numbers that are the sum of four nonzero squares.

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

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OFFSET

1,1

COMMENTS

These are the even numbers of A000414 divided by 2.

LINKS

Table of n, a(n) for n=1..70.

FORMULA

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

CROSSREFS

Cf. A000414.

Sequence in context: A228089 A126971 A175354 * A286727 A090946 A299417

Adjacent sequences: A224775 A224776 A224777 * A224779 A224780 A224781

KEYWORD

nonn

AUTHOR

Wolfdieter Lang, May 09 2013

STATUS

proposed