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A105022 Entries in the n-th row of Pascal's triangle that have the 2's bit set in their binary expansion. 0
0, 0, 1, 2, 1, 2, 4, 4, 1, 2, 4, 8, 4, 8, 8, 8, 1, 2, 4, 8, 4, 8, 12, 16, 4, 8, 12, 16, 8, 16, 16, 16, 1, 2, 4, 8, 4, 8, 12, 16, 4, 8, 12, 24, 12, 24, 24, 32, 4, 8, 12, 16, 12, 24, 24, 32, 8, 16, 24, 32, 16, 32, 32, 32, 1, 2, 4, 8, 4, 8, 12, 16, 4, 8, 12, 24, 12, 24, 24, 32, 4, 8, 12, 24, 12, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

0's only occur for n=0 and 1, 1's only occur for n=2^k, 2's only occur for n=1+2^k, etc. - Robert G. Wilson v, Apr 01 2005

LINKS

Table of n, a(n) for n=0..85.

MATHEMATICA

PascalTwosBitCount[m_] := Plus @@ Table[BitAnd[Binomial[m, k], 2]/ 2, {k, 0, m}]

CROSSREFS

Cf. A104176.

Sequence in context: A323460 A129144 A295313 * A263293 A230535 A349741

Adjacent sequences: A105019 A105020 A105021 * A105023 A105024 A105025

KEYWORD

easy,nonn

AUTHOR

Jacob A. Siehler, Apr 03 2005

EXTENSIONS

More terms from Robert G. Wilson v, Apr 01 2005

STATUS

approved

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Last modified December 8 06:47 EST 2022. Contains 358673 sequences. (Running on oeis4.)