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A089651 Partial sums of the sequence : a(1)=1, a(1), a(1), a(1), a(1), a(2), a(2), a(2), a(2), a(3), a(3), a(3), a(3), a(4), ...each terms (not a(1)) repeated 4 times. +0
2
1, 2, 3, 4, 5, 7, 9, 11, 13, 16, 19, 22, 25, 29, 33, 37, 41, 46, 51, 56, 61, 68, 75, 82, 89, 98, 107, 116, 125, 136, 147, 158, 169, 182, 195, 208, 221, 237, 253, 269, 285, 304, 323, 342, 361, 383, 405, 427, 449, 474, 499, 524, 549, 578, 607, 636, 665 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A050376 A050198 A008740 this_sequence A063487 A081998 A074583

Adjacent sequences: A089648 A089649 A089650 this_sequence A089652 A089653 A089654

KEYWORD

easy,nonn

AUTHOR

DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Jan 02 2004

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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