A127802 - OEIS

A127802

a(0) = 1, a(n) = 3*A036987(n), n>1.

1, 3, 0, 3, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

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OFFSET

0,2

COMMENTS

Row sums of number triangle A127801.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..16384

MATHEMATICA

Join[{1}, 3*Rest[Table[PadRight[{1}, 2^k, 0], {k, 0, 6}]//Flatten]] (* James C. McMahon, Jan 04 2025 *)

PROG

(Python)

def A127802(n): return 3*int(not(n&(n+1))) if n else 1 # Chai Wah Wu, Jul 06 2022

CROSSREFS

Cf. A036987, A043529.

Sequence in context: A361527 A247704 A372344 * A165951 A300288 A340555

Adjacent sequences: A127799 A127800 A127801 * A127803 A127804 A127805

KEYWORD

nonn

AUTHOR

Paul Barry, Jan 29 2007

STATUS

approved