A172382 Diagonal sums of number triangle A172380.

1, 0, 1, 1, 3, 8, 25, 84, 301, 1139, 4528, 18849, 81968, 371622, 1753164, 8589608, 43624741, 229255133, 1244544545, 6968765313, 40195073827, 238527741350, 1454722738679, 9108812009826, 58503226812174, 385086101416594

Offset

0,5

Comments

a(n+2) gives the diagonal sums of A172381.

Links

Table of n, a(n) for n=0..25.

Crossrefs

Sequence in context: A207651 A361959 A038665 * A151426 A045900 A000738

Adjacent sequences: A172379 A172380 A172381 * A172383 A172384 A172385

Keyword

nonn

Author

Paul Barry, Feb 01 2010

Status

approved