A059574 -id:A059574 - cp's OEIS frontend

A059577 Main diagonal of the array A059574.

1, 4, 87, 4239, 385422, 56304887, 12069075787, 3566873953872, 1389853778362041, 690363881963396569, 425768137345317003930, 319198739428765958327137, 285884881894650500659218725, 301473688731974642805982034540, 369723877220104937359593829963363

Offset: 1

Floor van Lamoen, Jan 23 2001

More terms from Sean A. Irvine, Sep 29 2022

A059513 Variation of Boustrophedon transform applied to 1,1,1,1,... Fill an array by diagonals, in alternating directions. The first entry is 1 each time. For the next element of a diagonal, add to the previous element the elements of the row and the column the new element is in. The final element of each diagonal gives a(n).

Original entry on oeis.org

1, 2, 6, 23, 116, 736, 5659, 50796, 521040, 6006587, 76874524, 1081439062, 16586149365, 275442822510, 4924040788654

Offset: 1

Floor van Lamoen, Jan 23 2001

			The array begins
1 ....2 ...1 ..23 ..1 ...
1 ....4 ..19 ..48 ...
6 ...13 ..87 ...
1 ..107 ...
116 ...
1 ...

Cf. A000667, A035002, A059216, A059219, A059575, A059574.

A059575 The array described in A059513 read by antidiagonals in the direction of construction.

Original entry on oeis.org

1, 1, 2, 1, 4, 6, 1, 13, 19, 23, 1, 48, 87, 107, 116, 1, 243, 458, 635, 708, 736, 1, 1517, 2967, 4239, 5163, 5533, 5659, 1, 11562, 22824, 33291, 41772, 47733, 50031, 50796, 1, 103125, 204598, 301161, 385422, 452016, 497789, 515254, 521040

Offset: 1

Floor van Lamoen, Jan 23 2001

Cf. A000667, A035002, A059216, A059219, A059574.

Sequence contained two errors corrected by N. J. A. Sloane, Jun 14 2005

cp's OEIS Frontend

A059577 Main diagonal of the array A059574.

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A059575 The array described in A059513 read by antidiagonals in the direction of construction.

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