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A028263
Elements in 3-Pascal triangle A028262 (by row) that are not 1.
4
3, 4, 4, 5, 8, 5, 6, 13, 13, 6, 7, 19, 26, 19, 7, 8, 26, 45, 45, 26, 8, 9, 34, 71, 90, 71, 34, 9, 10, 43, 105, 161, 161, 105, 43, 10, 11, 53, 148, 266, 322, 266, 148, 53, 11, 12, 64, 201, 414, 588, 588, 414, 201, 64, 12, 13, 76, 265, 615, 1002, 1176, 1002, 615, 265, 76, 13
OFFSET
0,1
COMMENTS
Rows of triangle formed using Pascal's rule except begin and end n-th row with n+3.
FORMULA
T(n,k) = A007318(n,k) + A014410(n+2,k+1). [Reinhard Zumkeller, Mar 12 2012]
EXAMPLE
The triangle T(n,k) begins
n\k 0 1 2 3 4 5 6 7 8 9 10 ...
0: 3
1: 4 4
2: 5 8 5
3: 6 13 13 6
4: 7 19 26 19 7
5: 8 26 45 45 26 8
6: 9 34 71 90 71 34 9
7: 10 43 105 161 161 105 43 10
8: 11 53 148 266 322 266 148 53 11
9: 12 64 201 414 588 588 414 201 64 12
10: 13 76 265 615 1002 1176 1002 615 265 76 13
... Reformatted. - Wolfdieter Lang, Jun 28 2015
PROG
(Haskell)
a028263 n k = a028263_tabl !! n !! k
a028263_row n = a028263_tabl !! n
a028263_tabl = zipWith (zipWith (+)) a007318_tabl a014410_tabl
-- Reinhard Zumkeller, Mar 12 2012
CROSSREFS
Row sums give A051633(n).
Sequence in context: A322407 A111914 A051665 * A059179 A279678 A222283
KEYWORD
nonn,tabl
EXTENSIONS
More terms from James A. Sellers
STATUS
approved