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

Offset

0,2

Comments

Row sums of number triangle A127801.

Links

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

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: A247706 A361527 A247704 * A165951 A300288 A340555

Adjacent sequences: A127799 A127800 A127801 * A127803 A127804 A127805

Keyword

nonn

Author

Paul Barry, Jan 29 2007

Status

approved