A011857 Triangle of numbers [ C(n,k)/k ], k=1..n-1.

2, 3, 1, 4, 3, 1, 5, 5, 3, 1, 6, 7, 6, 3, 1, 7, 10, 11, 8, 4, 1, 8, 14, 18, 17, 11, 4, 1, 9, 18, 28, 31, 25, 14, 5, 1, 10, 22, 40, 52, 50, 35, 17, 5, 1, 11, 27, 55, 82, 92, 77, 47, 20, 6, 1, 12, 33, 73, 123, 158, 154, 113, 61, 24, 6, 1, 13, 39, 95, 178, 257, 286, 245, 160

Offset

2,1

Links

Table of n, a(n) for n=2..75.

Mathematica

Flatten[Table[Floor[Binomial[n, k]/k], {n, 20}, {k, n-1}]] (* Harvey P. Dale, Apr 19 2015 *)

Crossrefs

Columns include A011848, A011849, A011850, A011851, A011852, A011853, A011854, A011855, A011856. Row sums are in A101687. Cf. A011847.

Sequence in context: A365327 A125933 A255054 * A242360 A299927 A006021

Adjacent sequences: A011854 A011855 A011856 * A011858 A011859 A011860

Keyword

tabl,nonn,easy

Author

N. J. A. Sloane.

Status

approved