A184885 Irregular triangle in which row n has the values of k>1 such that sum_{i=n..n+k-1} i^2 is a square.

24, 2, 578, 961, 23, 33, 50, 184, 2209, 24, 552049, 22898, 96, 97, 312, 23, 5329, 11, 2, 24, 289, 1221025, 96, 59, 6889, 24, 26, 49, 554, 600, 3601, 21600, 33, 338, 50, 96, 169, 578, 4056, 61250, 148825, 11, 59, 312, 649, 11881, 24, 50, 122, 15625, 96, 338, 3479, 2075, 33, 3179, 242, 218, 864, 50, 8450, 122, 22801, 36481, 24, 194, 25921, 50, 242

Offset

1,1

Comments

That is, this sequence gives the number of squares in the sums described in A184763. Sequence A184762 gives the length of row n. A180442 lists the nonempty rows. All these numbers must appear in A001032.

Links

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

Formula

Row n = row n of A184763 minus n-1.

Example

The triangle is
(row 1)  24
(row 3)  2, 578, 961
(row 7)  23, 33, 50, 184, 2209
(row 9)  24, 552049
(row 11) 22898
(row 13) 96
(row 15) 97, 312

Crossrefs

Sequence in context: A040573 A040574 A040575 * A159540 A040564 A040565

Adjacent sequences: A184882 A184883 A184884 * A184886 A184887 A184888

Keyword

nonn,tabf,hard

Author

T. D. Noe, Jan 24 2011

Status

approved