A063415 Triangle of coefficients of di-Boustrophedon transform (see A063179) read by rows: Let the original sequence be (U0,U1,...) and the transformed sequence (V0,V2,...), then Vn is a linear combination of U0,...,Un. T(n,m) is the coefficient that goes with Um to get Vn.

1, 1, 1, 2, 2, 1, 4, 5, 3, 1, 12, 14, 9, 4, 1, 42, 51, 32, 14, 5, 1, 178, 214, 137, 60, 20, 6, 1, 870, 1049, 668, 295, 100, 27, 7, 1, 4830, 5820, 3713, 1636, 555, 154, 35, 8, 1, 29976, 36125, 23036, 10160, 3446, 952, 224, 44, 9, 1, 205572, 247734, 157993, 69664

Offset

0,4

Links

Table of n, a(n) for n=0..58.

Example

The triangle begins:
......1
....1...1
..2...2...1
4...5...3...1

Crossrefs

T(n, 0) is A063179. Row sums form A062704. T(n, n-2) is A000096. Cf. A059718.

Sequence in context: A064189 A273897 A330792 * A098977 A247311 A113547

Adjacent sequences: A063412 A063413 A063414 * A063416 A063417 A063418

Keyword

nonn,tabl

Author

Floor van Lamoen, Jul 19 2001

Status

approved