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A062047 Sum of odd numbers between consecutive primes. +0
1
0, 0, 0, 9, 0, 15, 0, 21, 52, 0, 68, 39, 0, 45, 100, 112, 0, 128, 69, 0, 152, 81, 172, 279, 99, 0, 105, 0, 111, 720, 129, 268, 0, 576, 0, 308, 320, 165, 340, 352, 0, 744, 0, 195, 0, 1025, 1085, 225, 0, 231, 472, 0, 984, 508, 520, 532, 0, 548, 279, 0, 1152, 1800, 309, 0 (list; graph; listen)
OFFSET

0,4

FORMULA

a(n) = {p(n+1) +p(n)}*{p(n+1) - p(n)-2}/4.

EXAMPLE

a(4) = 9 is the single odd number between 7 and 11.

CROSSREFS

a(n)= ( p(n)+e(n) )*( e(n)-1 ), e(n) := A001223(n) / 2, for n > 1, cf. A062046.

A062046.

Sequence in context: A029687 A132696 A056965 this_sequence A117465 A136679 A070929

Adjacent sequences: A062044 A062045 A062046 this_sequence A062048 A062049 A062050

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 06 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org) and Jason Earls (zevi_35711(AT)yahoo.com), Jun 07 2001

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


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