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A079300 a(n) = the number of minimal addition chains ending in n. 6
1, 1, 1, 1, 2, 2, 5, 1, 3, 4, 15, 3, 10, 14, 4, 1, 2, 7, 33, 6, 29, 40, 4, 4, 14, 24, 5, 23, 132, 12, 77, 1, 2, 4, 43, 12, 39, 92, 20, 8, 23, 84, 4, 69, 14, 8, 220, 5, 12, 36, 4, 38, 205, 16, 156, 32, 173, 352, 37, 24, 91, 233, 87, 1, 2, 4, 23, 6, 29, 134, 1258, 18, 49, 104, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

D. W. Wilson, Table of n, a(n) for n = 1..1024

Eric Weisstein's World of Mathematics, Addition Chain

EXAMPLE

7 has a(7) = 5 minimal addition chains: (1,2,3,4,7), (1,2,3,5,7), (1,2,3,6,7), (1,2,4,5,7), (1,2,4,6,7).

CROSSREFS

Sequence in context: A016586 A073690 A079301 * A128932 A286150 A071950

Adjacent sequences:  A079297 A079298 A079299 * A079301 A079302 A079303

KEYWORD

nonn

AUTHOR

David W. Wilson, Feb 09 2003

EXTENSIONS

More terms from Don Reble, Mar 31 2006

STATUS

approved

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Last modified November 18 16:10 EST 2018. Contains 317323 sequences. (Running on oeis4.)