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A074883 Triangle generated by Pascal's rule, except begin and end the n-th row with sigma(n). 0
1, 3, 3, 4, 6, 4, 7, 10, 10, 7, 6, 17, 20, 17, 6, 12, 23, 37, 37, 23, 12, 8, 35, 60, 74, 60, 35, 8, 15, 43, 95, 134, 134, 95, 43, 15, 13, 58, 138, 229, 268, 229, 138, 58, 13, 18, 71, 196, 367, 497, 497, 367, 196, 71, 18 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

Triangle begins:

1;

3, 3;

4, 6, 4;

7, 10, 10, 7;

6, 17, 20, 17, 6;

12, 23, 37, 37, 23, 12;

8, 35, 60, 74, 60, 35, 8;

PROG

(PARI) t(n, k) = {if (k<1 || k>n, return (0)); if (k==1 || k==n, return (sigma(n))); return (t(n-1, k-1) + t(n-1, k)); }

tabl(nn) = {for (n=1, nn, for (k=1, n, print1(t(n, k), ", "); ); print(); ); }  \\ Michel Marcus, May 19 2013

CROSSREFS

Sequence in context: A196485 A196718 A265652 * A338015 A337019 A196245

Adjacent sequences:  A074880 A074881 A074882 * A074884 A074885 A074886

KEYWORD

easy,nonn,tabl

AUTHOR

Joseph L. Pe, Sep 30 2002

EXTENSIONS

More terms from Michel Marcus, May 19 2013

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)