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Search: id:A061981
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A061981 3^n - 2n - 1. +0
2
0, 0, 4, 20, 72, 232, 716, 2172, 6544, 19664, 59028, 177124, 531416, 1594296, 4782940, 14348876, 43046688, 129140128, 387420452, 1162261428, 3486784360, 10460353160, 31381059564, 94143178780, 282429536432, 847288609392 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Column of A061980.

Sequence in context: A055538 A123613 A006740 this_sequence A054611 A121257 A125669

Adjacent sequences: A061978 A061979 A061980 this_sequence A061982 A061983 A061984

KEYWORD

nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), May 24 2001

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

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