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A159610 Triangle read by rows, n-th row = n terms of A000255: (1, 3, 11, 53, 309,...); right border = A000166 starting (1, 2, 9, 44, 265,...) 3
1, 3, 2, 11, 11, 9, 53, 53, 53, 44, 309, 309, 309, 309, 265, 2119, 2119, 2119, 2119, 2119, 1854, 16687, 16687, 16687, 16687, 16687, 14833, 148329, 148329, 148329, 148329, 148329, 148329, 148329, 133496 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A002469(n+2), representing the game of mousetrap with n cards; where nonzero terms of A002469 start: (1, 5, 31, 203, 1501,...). A002469(n) = (n-2)*A000255(n-1) + A000166(n). Example 31 = 2*11 + 9 = A002469(4) = 2*A000255(3) + A000166(4).

LINKS

Table of n, a(n) for n=0..34.

FORMULA

Triangle read by rows, n-th row = n terms of A000255: (1, 3, 11, 53, 309,...); right border = A000166 starting (1, 2, 9, 44, 265,...)

EXAMPLE

First few rows of the triangle =

1;

3, 2;

11, 11, 9;

53, 53, 53, 44;

309, 309, 309, 309, 265;

2119, 2119, 2119, 2119, 2119, 1854;

16687, 16687, 16687, 16687, 16687, 16687, 14833;

...

CROSSREFS

Cf. A002469, A000166, A000255

Sequence in context: A072634 A086194 A258386 * A074246 A134426 A122672

Adjacent sequences:  A159607 A159608 A159609 * A159611 A159612 A159613

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Apr 17 2009

STATUS

approved

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Last modified October 22 18:17 EDT 2019. Contains 328319 sequences. (Running on oeis4.)