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A105537 Matrix square of triangle A105535 and, in this flattened form as read by rows, also equals diagonal 1 of A105535. 2
1, 2, 1, 4, 4, 1, 6, 8, 2, 1, 12, 26, 7, 12, 4, 21, 55, 15, 34, 12, 1, 32, 91, 25, 65, 22, 2, 1, 52, 178, 44, 237, 80, 10, 24, 9, 83, 329, 74, 593, 200, 27, 82, 32, 1, 127, 557, 117, 1178, 396, 55, 196, 76, 4, 1, 185, 866, 174, 1990, 670, 95, 361, 135, 8, 2, 1, 273, 1411, 261 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Diagonal n of triangular matrix A105535 equals A105535^(n+1) when flattened as read by rows.

LINKS

Table of n, a(n) for n=0..68.

EXAMPLE

Triangle begins:

1;

2,1;

4,4,1;

6,8,2,1;

12,26,7,12,4;

21,55,15,34,12,1;

32,91,25,65,22,2,1;

52,178,44,237,80,10,24,9;

83,329,74,593,200,27,82,32,1;

127,557,117,1178,396,55,196,76,4,1; ...

PROG

(PARI)

CROSSREFS

Cf. A105535, A105538 (row sums).

Sequence in context: A009949 A070785 A214985 * A115237 A105542 A208907

Adjacent sequences:  A105534 A105535 A105536 * A105538 A105539 A105540

KEYWORD

nonn,tabl

AUTHOR

Paul D. Hanna, Apr 12 2005

STATUS

approved

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Last modified January 20 14:02 EST 2020. Contains 331094 sequences. (Running on oeis4.)