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A178748 Total number of '1' bits in the terms of 'rows' of A178746 2
1, 2, 7, 14, 37, 80, 187, 410, 913, 1988, 4327, 9326, 20029, 42776, 91027, 192962 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

FORMULA

G.f: 1/2*x^3-1/4+(x^4+x^3-3/4*x^2-1/2*x+1/4)*F(x) = 0 (from GUESSS)

a(n) = (2^n *(3n+8)+(3n+1)*(-1)^n)/9 [From David Scambler, Jun 10 2010]

EXAMPLE

bitcount(1) = 1, bitcount(3) = 2, bitcount(6,6,7) = 7,

CROSSREFS

See also A178747 - sum of terms in rows of A178746

Contribution from David Scambler, Jun 10 2010: (Start)

Sum of adjacent terms equals the difference of adjacent terms in A127981.

a(n) + a(n-1) = A127981(n+1) - A127981(n) (End)

Sequence in context: A191389 A191319 A018497 * A194590 A107373 A176662

Adjacent sequences:  A178745 A178746 A178747 * A178749 A178750 A178751

KEYWORD

nonn

AUTHOR

David Scambler, Jun 09 2010

STATUS

approved

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Last modified March 26 12:43 EDT 2019. Contains 321497 sequences. (Running on oeis4.)