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A066202 Array T(n,k) (n>=1, k>=1) read by antidiagonals: T(n,n) = 1 for all n; fill in array above diagonal by symmetry; for row n, starting at diagonal T(n,n)=1, for k > n, T(n,k) = T(n,k-1)-(k-1) if this is positive and has not already appeared in this row, otherwise T(n,k) = T(n,k-1)+(k-1). 3
1, 2, 2, 4, 1, 4, 7, 3, 3, 7, 3, 6, 1, 6, 3, 8, 10, 4, 4, 10, 8, 14, 5, 8, 1, 8, 5, 14, 21, 11, 13, 5, 5, 13, 11, 21, 13, 4, 7, 10, 1, 10, 7, 4, 13, 22, 12, 14, 16, 6, 6, 16, 14, 12, 22, 12, 21, 6, 9, 12, 1, 12, 9, 6, 21, 12, 23, 31, 15, 17, 19, 7, 7, 19, 17, 15, 31, 23, 11, 20, 5, 8, 11, 14, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..85.

Index entries for sequences related to Recamán's sequence

EXAMPLE

Array begins

1 2 4 7 3 8 ...

2 1 3 6 10 5 ...

4 3 1 4 8 13 ...

7 6 4 1 5 10 ...

CROSSREFS

Rows give A063733, A066203, A066204. Cf. A066201 for another version.

Sequence in context: A140819 A138558 A111580 * A027420 A116588 A069922

Adjacent sequences:  A066199 A066200 A066201 * A066203 A066204 A066205

KEYWORD

nonn,easy,tabl

AUTHOR

N. J. A. Sloane, Dec 16 2001

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003

STATUS

approved

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Last modified September 22 00:25 EDT 2017. Contains 292326 sequences.