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A122189 Heptanacci numbers: each term is the sum of the preceding 7 terms, with a(0),...,a(6) = 0,0,0,0,0,0,1. +0
2
0, 0, 0, 0, 0, 0, 1, 1, 2, 4, 8, 16, 32, 64, 127, 253, 504, 1004, 2000, 3984, 7936, 15808, 31489, 62725, 124946, 248888, 495776, 987568, 1967200, 3918592, 7805695, 15548665, 30972384, 61695880, 122895984, 244804400, 487641600, 971364608 (list; graph; listen)
OFFSET

1,9

COMMENT

See A066178 (essentially the same sequence) for more about the heptanacci numbers and other generaizations of the Fibonacci numbers (A000045).

CROSSREFS

Cf. A000045, A066178, A000322, A001591, A001592.

Sequence in context: A062257 A062258 A066178 this_sequence A133024 A060376 A047869

Adjacent sequences: A122186 A122187 A122188 this_sequence A122190 A122191 A122192

KEYWORD

nonn

AUTHOR

Roger Bagula and Gary Adamson (qntmpkt(AT)yahoo.com), Oct 18 2006

EXTENSIONS

Edited by njas, Nov 20 2007

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


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