A247488 Triangle read by rows: T(n,k) = abs(C(n-k, k)*hypergeom([k-n/2, k-n/2+1/2], [1], -4)).

1, 1, 1, 1, 5, 2, 5, 3, 1, 11, 20, 3, 41, 25, 6, 1, 29, 66, 50, 4, 125, 287, 75, 10, 1, 365, 232, 231, 100, 5, 131, 1125, 1148, 175, 15, 1, 1409, 3650, 1044, 616, 175, 6, 3301, 1441, 5625, 3444, 350, 21, 1, 155, 16908, 20075, 3480, 1386, 280, 7

Offset

0,5

Links

Table of n, a(n) for n=0..55.

Example

               1
               1
              1, 1
              5, 2
            5, 3, 1
           11, 20, 3
          41, 25, 6, 1
         29, 66, 50, 4
      125, 287, 75, 10, 1
     365, 232, 231, 100, 5
  131, 1125, 1148, 175, 15, 1
1409, 3650, 1044, 616, 175, 6

Maple

A247488 := (n, k) -> abs(binomial(n-k, k)*hypergeom([k-n/2, k-n/2+1/2], [1], -4)): seq(print(seq(round(evalf(A247488(n, k))), k=0..iquo(n, 2))), n =0..19);

Crossrefs

Cf. A132885.

Sequence in context: A244892 A278066 A153107 * A199957 A020855 A007292

Adjacent sequences: A247485 A247486 A247487 * A247489 A247490 A247491

Keyword

nonn,tabf

Author

Peter Luschny, Sep 18 2014

Status

approved