A174014 Deleham triangle [1,1,-1,1,1,-1,1,...] DELTA [1,0,0,1,0,0,1,0,...], DELTA defined in A084938.

1, 1, 1, 2, 3, 1, 3, 7, 5, 1, 4, 13, 15, 7, 1, 4, 19, 33, 26, 9, 1, 2, 19, 53, 66, 40, 11, 1, -3, 3, 51, 115, 115, 57, 13, 1, -10, -37, -19, 103, 215, 183, 77, 15, 1, -14, -89, -193, -120, 173, 364, 273, 100, 17, 1, -4, -91, -387, -664, -406, 252, 574, 388, 126, 19, 1

Offset

0,4

Comments

First column is A174015. Row sums are A174016. Diagonal sums are A174013.

Links

Table of n, a(n) for n=0..65.

Example

Triangle begins
1,
1, 1,
2, 3, 1,
3, 7, 5, 1,
4, 13, 15, 7, 1,
4, 19, 33, 26, 9, 1,
2, 19, 53, 66, 40, 11, 1,
-3, 3, 51, 115, 115, 57, 13, 1,
-10, -37, -19, 103, 215, 183, 77, 15, 1,
-14, -89, -193, -120, 173, 364, 273, 100, 17, 1

Crossrefs

Sequence in context: A136555 A343627 A188107 * A236376 A063967 A059397

Adjacent sequences: A174011 A174012 A174013 * A174015 A174016 A174017

Keyword

easy,sign,tabl

Author

Paul Barry, Mar 05 2010

Status

approved