A196569 Binomial coefficients of the form C(n, 4) that is a concatenation of binomial coefficients of the form C(n, 4).

15, 1001, 12650, 14950, 387670507005

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Erich Friedman, Problem of the month October 2011

Example

15 = 1 & 5
1001 = 1 & 0 & 0 & 1
12650 = 126 & 5 & 0
14950 = 1 & 495 & 0
387670507005 = 3876 & 70 & 5 & 0 & 70 & 0 & 5

Crossrefs

Sequence in context: A274713 A229840 A102102 * A019282 A082158 A064625

Adjacent sequences: A196566 A196567 A196568 * A196570 A196571 A196572

Keyword

nonn,base,bref

Author

Kausthub Gudipati, Oct 04 2011

Status

approved