A144909 Triangle read by rows: rad(n) along left edge (n, 1) and core(n) along right edge (n, n), with (n, k) = (n - 1, k - 1) + (n - 1, k) for 1 < k < n when n > 2.

1, 2, 2, 3, 4, 3, 2, 7, 7, 1, 5, 9, 14, 8, 5, 6, 14, 23, 22, 13, 6, 7, 20, 37, 45, 35, 19, 7, 2, 27, 57, 82, 80, 54, 26, 2, 3, 29, 84, 139, 162, 134, 80, 28, 1, 10, 32, 113, 223, 301, 296, 214, 108, 29, 10, 11, 42, 145, 336, 524, 597, 510, 322, 137, 39, 11

Offset

1,2

Links

Table of n, a(n) for n=1..66.

Crossrefs

Cf. A007913, A007947

Sequence in context: A077769 A286543 A285732 * A352636 A117114 A307981

Adjacent sequences: A144906 A144907 A144908 * A144910 A144911 A144912

Keyword

easy,nonn,tabl

Author

Reikku Kulon, Sep 24 2008

Status

approved