A049827 a(n) = T(2n-1,n)+T(2n,n+1)+...+T(3n-3,2n-2) = sum over a period of n-th diagonal of array T given by A049816.

0, 1, 3, 6, 8, 13, 13, 20, 22, 25, 27, 38, 32, 45, 45, 46, 50, 63, 59, 74, 64, 71, 77, 96, 78, 93, 99, 102, 100, 125, 101, 132, 122, 129, 139, 136, 128, 161, 157, 162, 150, 187, 155, 198, 176, 177, 197, 224, 186, 213, 211, 220, 216, 257, 221, 238, 222, 249

Offset

1,3

Links

Table of n, a(n) for n=1..58.

Crossrefs

Cf. A049816.

Sequence in context: A006048 A245989 A350928 * A186736 A072107 A084578

Adjacent sequences: A049824 A049825 A049826 * A049828 A049829 A049830

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Aug 07 2021

Status

approved