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A144910 Triangle read by rows: rad(n) along left edge (n, 1) and core(n) along right edge (n, n), with (n, k) = rad((n - 1, k - 1) + (n - 1, k)) for 1 < k < n when n > 2. 1
1, 2, 2, 3, 2, 3, 2, 5, 5, 1, 5, 7, 10, 6, 5, 6, 6, 17, 2, 11, 6, 7, 6, 23, 19, 13, 17, 7, 2, 13, 29, 42, 2, 30, 6, 2, 3, 15, 42, 71, 22, 2, 6, 2, 1, 10, 6, 57, 113, 93, 6, 2, 2, 3, 10, 11, 2, 21, 170, 206, 33, 2, 2, 5, 13, 11, 6, 13, 23, 191, 94, 239, 35, 2, 7, 6, 6, 3 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..78.

CROSSREFS

Cf. A007913, A007947, A144909

Sequence in context: A165916 A096013 A072380 * A080330 A152872 A072832

Adjacent sequences:  A144907 A144908 A144909 * A144911 A144912 A144913

KEYWORD

easy,nonn,tabl

AUTHOR

Reikku Kulon, Sep 24 2008

STATUS

approved

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Last modified February 17 12:14 EST 2020. Contains 331996 sequences. (Running on oeis4.)