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A062707 Table by antidiagonals of nk(k+1)/2. +0
1
0, 0, 0, 0, 1, 0, 0, 3, 2, 0, 0, 6, 6, 3, 0, 0, 10, 12, 9, 4, 0, 0, 15, 20, 18, 12, 5, 0, 0, 21, 30, 30, 24, 15, 6, 0, 0, 28, 42, 45, 40, 30, 18, 7, 0, 0, 36, 56, 63, 60, 50, 36, 21, 8, 0, 0, 45, 72, 84, 84, 75, 60, 42, 24, 9, 0, 0, 55, 90, 108, 112, 105, 90, 70, 48, 27, 10, 0, 0, 66 (list; table; graph; listen)
OFFSET

0,8

FORMULA

T(n, k) =T(n, 1)*T(1, k) =A001477(n)*A000217(k) =A057145(n+2, k+1)-(k+1).

EXAMPLE

Rows start: 0 0 0 0 0 1 3 6 0 2 6 12 0 3 9 18

CROSSREFS

Main diagonal is A002411. Sum of antidiagonals is A000332.

Sequence in context: A055654 A062787 A131370 this_sequence A059033 A133209 A131290

Adjacent sequences: A062704 A062705 A062706 this_sequence A062708 A062709 A062710

KEYWORD

easy,nonn,tabl

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Jul 11 2001

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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