A189217 Triangle read by rows of the index of the least k-gonal number A189216(n,k).

2, 8, 2, 20, 99, 2, 3, 35, 165, 2, 10, 9, 54, 247, 2, 6, 15, 11, 77, 345, 2, 25, 3, 21, 13, 104, 459, 2, 4, 0, 91, 28, 15, 135, 589, 2, 0, 14, 22, 0, 36, 17, 170, 735, 2, 14, 8, 3, 17, 86, 45, 19, 209, 897, 2, 8, 6, 7, 46, 16, 58, 55, 21, 252, 1075, 2, 50, 21, 0, 171, 3081, 861, 153, 66, 23, 299, 1269, 2

Offset

3,1

Comments

The n-th term of the n-th row is 2. The first and second columns are A188893 and A188897.

Links

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

Example

The triangle begins:
2,
8,   2
20,  99,  2
3,   35,  165,  2
10,  9,   54,   247,  2
6,   15,  11,   77,   345,  2
25,  3,   21,   13,   104,  459,   2
4,   0,   91,   28,   15,   135,   589,   2
0,   14,  22,   0,    36,   17,    170,   735,   2

Crossrefs

Sequence in context: A074723 A286455 A175183 * A183037 A063077 A245995

Adjacent sequences: A189214 A189215 A189216 * A189218 A189219 A189220

Keyword

nonn,tabl

Author

T. D. Noe, Apr 18 2011

Status

approved