A128442 Array T by antidiagonals: T(n,k)=Floor(k*2^(n/2)).

1, 2, 2, 4, 4, 2, 5, 6, 5, 4, 7, 8, 8, 8, 5, 8, 10, 11, 12, 11, 8, 9, 12, 14, 16, 16, 16, 11, 11, 14, 16, 20, 22, 24, 22, 16, 12, 16, 19, 24, 28, 32, 33, 32, 22, 14, 18, 22, 28, 33, 40, 45, 48, 45, 32, 15, 20, 25, 32, 39, 48, 56, 64, 67, 64, 45, 16, 22, 28, 36, 45, 56, 67, 80, 90

Offset

1,2

Comments

Row 1 = A001951; Row 2 = A005843; Row 3 = A022842; Row 4 = A008586; Column 1 = A017910; T(n,n) = A128441(n).

Links

Table of n, a(n) for n=1..75.

Example

Northwest corner:
1 2 4 5 7
2 4 6 8 10
2 5 8 11 14
4 8 12 16 20
5 11 16 22 28

Crossrefs

Cf. A005843, A008586, A128441.

Sequence in context: A048244 A056673 A353761 * A290633 A038674 A330639

Adjacent sequences: A128439 A128440 A128441 * A128443 A128444 A128445

Keyword

nonn,tabl

Author

Clark Kimberling, Mar 03 2007

Status

approved