A096966 Triangle (read by rows) in which the number of entries in a row only increases by 1 every other row, the first column and the 'diagonal' is set to all 1's and a(i,j) = a(i-1,j) + a(i-1,j-1) + a(i-2,j-1) + a(i-3,j-1) for other entries.

1, 1, 1, 1, 1, 4, 1, 7, 1, 1, 10, 13, 1, 13, 34, 1, 1, 16, 64, 49, 1, 19, 103, 160, 1, 1, 22, 151, 361, 211, 1, 25, 208, 679, 781, 1, 1, 28, 274, 1141, 1981, 994, 1, 31, 349, 1774, 4162, 3967, 1, 1, 34, 433, 2605, 7756, 10891, 4963, 1, 37, 526, 3661, 13276, 24790, 20815, 1

Offset

0,6

Comments

The 2nd column is A016777 (3n+1), the 3rd column is A081271 (Vertical of triangular spiral in A051682.)

Links

Table of n, a(n) for n=0..63.

Crossrefs

Sequence in context: A291056 A248831 A227729 * A140703 A346533 A157259

Adjacent sequences: A096963 A096964 A096965 * A096967 A096968 A096969

Keyword

nonn,tabf

Author

Gerald McGarvey, Aug 18 2004

Status

approved