OFFSET
1,1
COMMENTS
This is the array remaining after row 1 is expelled from the array in A163253.
LINKS
Clark Kimberling, Doubly interspersed sequences, double interspersions and fractal sequences, The Fibonacci Quarterly 48 (2010) 13-20.
FORMULA
Let S(n,k) for the k-th term in the n-th row.
if n is odd, then S(n,k)=k^2+(n-1)k+(n^2+3)/4;
if n is even, then S(n,k)=k^2+(n-1)k+(n^2)/4.
EXAMPLE
Corner:
2....5...10...17...26
3....7...13...21...31
6...11...18...27...38
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Jul 23 2009
STATUS
approved