A144911 Triangle read by rows: rad(n) along left edge (n, 1) and core(n) along right edge (n, n), with (n, k) = core((n - 1, k - 1) + (n - 1, k)) for 1 < k < n when n > 2.

1, 2, 2, 3, 1, 3, 2, 1, 1, 1, 5, 3, 2, 2, 5, 6, 2, 5, 1, 7, 6, 7, 2, 7, 6, 2, 13, 7, 2, 1, 1, 13, 2, 15, 5, 2, 3, 3, 2, 14, 15, 17, 5, 7, 1, 10, 6, 5, 1, 29, 2, 22, 3, 2, 10, 11, 1, 11, 6, 30, 31, 6, 1, 5, 3, 11, 6, 3, 3, 17, 1, 61, 37, 7, 6, 2, 14, 3, 13, 1, 6, 5, 2, 62, 2, 11, 13, 2, 1, 17, 13

Offset

1,2

Comments

There are many regions of small numbers surrounded by large numbers. The triangle becomes dominated by very large values eventually.

Links

Table of n, a(n) for n=1..91.

Crossrefs

Cf. A007913, A007947, A144909, A144910

Sequence in context: A083899 A339461 A190263 * A233431 A160650 A304092

Adjacent sequences: A144908 A144909 A144910 * A144912 A144913 A144914

Keyword

easy,nonn,tabl

Author

Reikku Kulon, Sep 24 2008

Status

approved