The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A231351 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A231351

a(n) = A231349(n+1)/2.
(history; published version)

#7 by Ralf Stephan at Sat Dec 21 04:15:59 EST 2013

STATUS

proposed

approved

#6 by Omar E. Pol at Tue Dec 17 17:45:15 EST 2013

STATUS

editing

proposed

#5 by Omar E. Pol at Tue Dec 17 17:41:58 EST 2013

COMMENTS

Observation: the row sums of the first six rows coincide with the first six elements of A006234.

Is A006234 the row sums of this triangle?

CROSSREFS

Cf. A006234, A231348, A231349.

#4 by Omar E. Pol at Tue Dec 17 17:35:36 EST 2013

LINKS

N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

CROSSREFS

Cf. A231348, A231349.

#3 by Omar E. Pol at Tue Dec 17 17:33:50 EST 2013

DATA

1, 2, 2, 2, 4, 5, 4, 2, 4, 6, 8, 5, 10, 11, 8, 2, 4, 6, 8, 6, 12, 14, 16, 5, 10, 14, 20, 11, 22, 23, 16, 2, 4, 6, 8, 6, 12, 14, 16, 6, 12, 16, 24, 14, 28, 30, 32, 5, 10, 14, 20, 14, 28, 32, 40, 11, 22, 30, 44, 23, 46, 47, 32, 2, 4, 6, 8, 6, 12, 14, 16

EXAMPLE

Written as an irregular triangle in which row lengths is A000079 the sequence begins:

CROSSREFS

Right border gives A000079.

#2 by Omar E. Pol at Tue Dec 17 17:26:21 EST 2013

NAME

allocated for Omar E. Pol

a(n) = A231349(n+1)/2.

DATA

OFFSET

1,2

EXAMPLE

Written as an irregular triangle in which row lengths is A000079 the sequence begins:

1;

2,2;

2,4,5,4;

2,4,6,8,5,10,11,8;

2,4,6,8,6,12,14,16,5,10,14,20,11,22,23,16;

2,4,6,8,6,12,14,16,6,12,16,24,14,28,30,32,5,10,14,20,14,28,32,40,11,22,30,44,23,46,47,32;

KEYWORD

allocated

nonn,tabf

AUTHOR

Omar E. Pol, Dec 17 2013

STATUS

approved

editing

#1 by Omar E. Pol at Thu Nov 07 21:25:32 EST 2013

NAME

allocated for Omar E. Pol

KEYWORD

allocated

STATUS

approved