A189218 Triangle read by rows of the index of the least n-gonal number A189216(n,k).

2, 6, 2, 12, 81, 2, 2, 25, 143, 2, 5, 6, 42, 221, 2, 3, 9, 8, 63, 315, 2, 10, 2, 14, 10, 88, 425, 2, 2, 0, 56, 20, 12, 117, 551, 2, 0, 7, 13, 0, 27, 14, 150, 693, 2, 5, 4, 2, 11, 61, 35, 16, 187, 851, 2, 3, 3, 4, 28, 11, 43, 44, 18, 228, 1025, 2, 15, 9, 0, 99, 1989, 609, 117, 54, 20, 273, 1215, 2

Offset

3,1

Comments

The n-th term of the n-th row is 2. The first and second columns are A188894 and A188898.

Links

Table of n, a(n) for n=3..80.

Example

The triangle begins:
2
6,   2
12,  81,   2
2,   25,   143,  2
5,   6,    42,   221,  2
3,   9,    8,    63,   315,  2
10,  2,    14,   10,   88,   425,  2
2,   0,    56,   20,   12,   117,  551,  2
0,   7,    13,   0,    27,   14,   150,  693,  2

Crossrefs

Sequence in context: A356016 A336852 A079462 * A122663 A100892 A351839

Adjacent sequences: A189215 A189216 A189217 * A189219 A189220 A189221

Keyword

nonn,tabl

Author

T. D. Noe, Apr 18 2011

Status

approved