A169941 - OEIS

A169941

Triangle read by rows: A169940 with rows reversed.

1, 1, 1, 1, 0, 3, 1, 1, 3, 3, 1, 0, 6, 4, 5, 1, 1, 6, 10, 7, 7, 1, 0, 9, 6, 27, 8, 13, 1, 1, 9, 17, 23, 41, 21, 15, 1, 0, 12, 8, 56, 34, 98, 20, 27, 1, 1, 12, 22, 50, 104, 96, 148, 53, 25, 1, 0, 15, 10, 96, 66, 294, 116, 325, 56, 45, 1, 1, 15, 27, 86, 184, 262, 518, 319

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OFFSET

1,6

LINKS

Table of n, a(n) for n=1..75.

Index entries for sequences related to carryless arithmetic

FORMULA

Wanted: a recurrence. Are any of A169940-A169954 related to any other entries in the OEIS?

EXAMPLE

Triangle begins:

[1]

[1, 1]

[1, 0, 3]

[1, 1, 3, 3]

[1, 0, 6, 4, 5]

[1, 1, 6, 10, 7, 7]

[1, 0, 9, 6, 27, 8, 13]

[1, 1, 9, 17, 23, 41, 21, 15]

[1, 0, 12, 8, 56, 34, 98, 20, 27]

[1, 1, 12, 22, 50, 104, 96, 148, 53, 25]

[1, 0, 15, 10, 96, 66, 294, 116, 325, 56, 45]

[1, 1, 15, 27, 86, 184, 262, 518, 319, 487, 89, 59]

[1, 0, 18, 12, 143, 112, 608, 346, 1279, 434, 942, 112, 89]

[1, 1, 18, 32, 131, 291, 528, 1166, 1153, 2181, 1042, 1348, 197, 103]

[1, 0, 21, 14, 199, 168, 1083, 720, 3313, 1568, 4981, 1320, 2613, 220, 163]

...

CROSSREFS

Related to thickness: A169940-A169954, A061909.

Sequence in context: A184831 A033989 A307501 * A099545 A300867 A269301

Adjacent sequences: A169938 A169939 A169940 * A169942 A169943 A169944

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Aug 01 2010

STATUS

approved