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A032769 Numbers that are congruent to {0, 1, 2, 4} mod 5. +0
3
0, 1, 2, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 16, 17, 19, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 39, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 54, 55, 56, 57, 59, 60, 61, 62, 64, 65, 66, 67, 69, 70, 71, 72, 74, 75, 76, 77, 79, 80, 81, 82, 84, 85 (list; graph; listen)
OFFSET

1,3

COMMENT

n(n+1)(n+2)(n+3)(n+4) / n+(n+1)+(n+2)+(n+3)+(n+4) is an integer.

FORMULA

(1/8) {10n - 1 - (-1)^n - 2(-1)^[(n-1)/2] }. - Ralf Stephan, Jun 09 2005

CROSSREFS

Cf. A032768, A032770.

Sequence in context: A103838 A039243 A039186 this_sequence A039139 A024616 A023733

Adjacent sequences: A032766 A032767 A032768 this_sequence A032770 A032771 A032772

KEYWORD

nonn

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.

EXTENSIONS

Better description from Michael Somos, Jun 08 2000.

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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