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A048516 Array T read by diagonals: T(m,n)=number of subsets S of {1,2,3,...,m+n-1} such that |S|>1 and |a-b|>=m for all distinct a and b in S, m=1,2,3,...; n=1,2,3,... 0
0, 0, 1, 0, 4, 1, 0, 11, 3, 1, 0, 26, 7, 3, 1, 0, 57, 14, 6, 3, 1, 0, 120, 26, 11, 6, 3, 1, 0, 247, 46, 19, 10, 6, 3, 1, 0, 502, 79, 31, 16, 10, 6, 3, 1, 0, 1013, 133, 49, 25, 15, 10, 6, 3, 1, 0, 2036, 221, 76, 38, 22, 15, 10, 6, 3, 1, 0, 4083, 364 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..69.

EXAMPLE

Diagonals: {0}; {1,0}; {4,1,0}; ...

CROSSREFS

Row 1 = A000295 (Eulerian nos.)

Row 2 = A001924 (Convolution of nat. nos. and Fibonacci nos.)

Sequence in context: A127155 A211793 A145880 * A060638 A244125 A007789

Adjacent sequences:  A048513 A048514 A048515 * A048517 A048518 A048519

KEYWORD

nonn,tabl

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 18 03:13 EST 2019. Contains 319260 sequences. (Running on oeis4.)