A065226 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the decagonal numbers. The final elements of the rows form a(n).

1, 2, 5, 9, 4, 10, 17, 25, 7, 17, 28, 40, 1, 15, 30, 46, 63, 81, 15, 35, 56, 78, 101, 125, 24, 50, 77, 105, 134, 164, 20, 52, 85, 119, 154, 190, 227, 33, 72, 112, 153, 195, 238, 282, 30, 76, 123, 171, 220, 270, 321, 3, 56, 110, 165, 221, 278, 336, 395, 4, 65, 127, 190

Offset

0,2

Links

Table of n, a(n) for n=0..62.

Crossrefs

Cf. A001107.

Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.

Sequence in context: A111761 A021798 A336830 * A118907 A246206 A200336

Adjacent sequences: A065223 A065224 A065225 * A065227 A065228 A065229

Keyword

easy,nonn

Author

Floor van Lamoen, Oct 22 2001

Status

approved